NBA Global Ambassador Dikembe Mutombo, The Duchess and Duke of Cambridge and PRESIDENT, ONEXIM SPORTS AND ENTERTAINMENT HOLDING USA, INC. Irina Pavlova, takes in the game between the Cleveland Cavaliers against the Brooklyn Nets at the Barclays Center on December 8, 2014 in Brooklyn. (Photo by David Dow/NBAE via Getty Images)
Duchess and Duke of Cambridge Attend Nets Game
A detailed view of Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge on the Jumbotron duirng the game between the Cleveland Cavaliers and the Brooklyn Nets at Barclays Center on December 8, 2014 in Brooklyn. (Photo by Al Bello/Getty Images)
Duchess and Duke of Cambridge Attend Nets Game
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge watch the game between the Cleveland Cavaliers and the Brooklyn Nets at Barclays Center on December 8, 2014 in Brooklyn. (Photo by Al Bello/Getty Images)
Cleveland Cavaliers v Brooklyn Nets
NBA Global Ambassador Dikembe Mutombo, The Duchess and Duke of Cambridge and PRESIDENT, ONEXIM SPORTS AND ENTERTAINMENT HOLDING USA, INC. Irina Pavlova, takes in the game between the Cleveland Cavaliers against the Brooklyn Nets at the Barclays Center on December 8, 2014. (Photo by David Dow/NBAE via Getty Images)
Cleveland Cavaliers v Brooklyn Nets
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge watch the game between the Cleveland Cavaliers and the Brooklyn Nets at Barclays Center on December 8, 2014. (Photo by Al Bello/Getty Images)
The Duke And Duchess Of Cambridge Attend Cleveland Cavaliers v Brooklyn Nets
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with LeBron James (R) backstage as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. (Photo by Neilson Barnard/Getty Images)
The Duke And Duchess Of Cambridge Attend Cleveland Cavaliers v Brooklyn Nets
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose with LeBron James as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. (Photo by Neilson Barnard- POOL/Getty Images)
The Duke And Duchess Of Cambridge Attend Cleveland Cavaliers v Brooklyn Nets
Prince William, Duke of Cambridge (C) and Catherine, Duchess of Cambridge (2nd L) pose with NBA Commissioner Adam Silver (2nd R), Global Ambassador Dikembe Mutombo (L) and Sr. Vice President, Community & Player Programs Kathleen Behrens (R) as they attend the Cleveland Cavaliers vs. Brooklyn Nets game at Barclays Center on December 8, 2014 in the Brooklyn borough of New York City. (Photo by Neilson Barnard/Getty Images)
The Duke Of Cambridge Attends The Conservation Reception
Hillary Rodham Clinton, Chelsea Clinton, Marc Mezvinsky, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend a reception co-hosted by the Royal Foundation and the Clinton Foundation at British Consul General's Residence on December 8, 2014 in New York City. (Photo by Eduardo Munoz Alvarez - Pool/Getty Images)
The Duchess Of Cambridge Attends Lunch At The British Consul General's Residence
Catherine, Duchess of Cambridge and British Consul General of New York Danny Lopez (2nd from L) chats with Simon Collins (L) , Dean of Fashion at Parsons at the New School of Design and at right is Pete Cashmore founder of the news site "Mashable" before a luncheon at the residence of the British Consul General during her official two-day visit to the United States on December 8, 2014 in New York City. Prince William and his wife Kate are on a visit to New York City, that includes visits to a Harlem child development center and the September 11 Monument and Museum. (Photo by Mike Segar-Pool/Getty Images)
The Duchess Of Cambridge Attends Lunch At The British Consul General's Residence
Catherine, Duchess of Cambridge attends a luncheon at the residence of the British Consul General during her official two-day visit to the United States on December 8, 2014 in New York City. Prince William and his wife Kate are on a visit to New York City, that includes visits to a Harlem child development center and the September 11 Monument and Museum. (Photo by Mike Segar-Pool/Getty Images)
The Duke And Duchess Of Cambridge In New York
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Hillary Rodham Clinton attend a reception co-hosted by the Royal Foundation and the Clinton Foundation at British Consul General's Residence on December 8, 2014 in New York City. (Photo by Eduardo Munoz Alvarez - Pool/Getty Images)
The Duke Of Cambridge Attends The Conservation Reception
Hillary Rodham Clinton, Chelsea Clinton Mezvinsky, Marc Mezvinsky, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend a reception co-hosted by the Royal Foundation and the Clinton Foundation at British Consul General's Residence on December 8, 2014 in New York City. (Photo by Eduardo Munoz Alvarez - Pool/Getty Images)
The Duke And Duchess Of Cambridge In New York
Prince William, Duke of Cambridge, and his wife, Catherine, Duchess of Cambridge, talk with Chelsea Clinton (R) and Marc Mezvinsky as they leave after attending the conservation reception at the British Consul General's Residence on December 8, 2014 in New York City. The royal couple are on an official three-day visit to New York with Prince William also due to meet President Barack Obama in Washington D.C on Monday. (Photo by Carl Court/Getty Images)
The Duchess Of Cambridge And First Lady Of New York City Visit Northside Center For Child Development
Catherine, Duchess of Cambridge (R) and New York City Mayor Bill de Blasio's wife Chirlane McCray (L) meet at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge (2R) wraps presents with Chirlane McCray (3L), the wife of the mayor of New York City, during a visit to Northside Center for Child Development on her official two-day visit to the United States on December 8, 2014 in New York City. (Photo by Seth Wenig-Pool/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge sits next to April, 4, left, and Sammy, 4, in a pre-school class as she visits Northside Center for Child Development during her official two-day visit to the United States on December 8, 2014 in New York City. (Photo by Seth Wenig-Pool/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge (L) helps to wrap presents for children with volunteer Mary Dawkins as she visits Northside Center for Child Development during her official two-day visit to the United States on December 8, 2014 in New York City. (Photo by Seth Wenig-Pool/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge, watches children as she visits Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Seth Wenig-Pool/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge, is greeted by World Bank President Jim Yong Kim before delivering remarks on illegal transportation of wildlife parts across borders during the International Corruption Hunters Alliance Conference at the World Bank on December 8, 2014 in Washington, DC. (Photo by Evan Vucci - Pool/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge watches children as she visits Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Seth Wenig-Pool/Getty Images)
The Duchess Of Cambridge And First Lady Of New York City Visit Northside Center For Child Development
Catherine, Duchess of Cambridge, helps to wrap Christmas presents during a visit with Chirlane McCray, the first lady of New York, to the Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Mark Stewart - Pool/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge, talks to a boy as she leaves after visiting Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Carl Court/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge and New York City First Lady Chirlane McCray greet guests at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
Duchess of Cambridge Kate at Northside Center for Child Development on December 8, 2014 in New York City. (Marla Diamond/WCBS 880)
Royal Couple Visits NYC
Duchess of Cambridge Kate at Northside Center for Child Development on December 8, 2014 in New York City. (Marla Diamond/WCBS 880)
Royal Couple Visits NYC
Fans wait to see Catherine, Duchess of Cambridge, as she arrives at Northside Center for Child Development on December 8, 2014 in New York City. The royal couple are on an official three-day visit to New York with Prince William also due to meet President Barack Obama in Washington D.C on Monday. (Photo by Carl Court/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge and New York City First Lady Chirlane McCray greet guests at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge and New York City First Lady Chirlane McCray meet at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge and New York City First Lady Chirlane McCray meet at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
Catherine, Duchess of Cambridge and New York City First Lady Chirlane McCray meet at Northside Center for Child Development on December 8, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Royal Couple Visits NYC
President Barack Obama meets with Prince William, Duke of Cambridge, in the Oval Office of the White House December 8, 2014 in Washington, DC. (Photo by Alex Wong/Getty Images)
Royal Couple Visits NYC
President Barack Obama meets with Prince William, Duke of Cambridge, in the Oval Office of the White House December 8, 2014 in Washington, DC. (Photo by Alex Wong/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge (R) and his wife, Catherine, Duchess of Cambridge, arrive at their hotel on December 7, 2014 in New York City.
Royal Couple Visits NYC
Prince William, Duke of Cambridge, arrives at his hotel on December 7, 2014 in New York City. (Photo by Carl Court/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official visit to the United States, on Dec. 7, 2014 in New York City. (Photo by Chad Rachman-Pool/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official visit to the United States, on Dec. 7, 2014 in New York City. (Photo by Chad Rachman-Pool/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official visit to the United States, on Dec. 7, 2014 in New York City. (Photo by Chad Rachman-Pool/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official visit to the United States, on Dec. 7, 2014 in New York City. (Photo by Chad Rachman-Pool/Getty Images)
Royal Couple Visits NYC
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge (L) arrive at The Carlyle Hotel, where they will be staying during their official visit to the United States, on Dec. 7, 2014 in New York City. (Photo by Neilson Barnard/Getty Images)
Prince William and Duchess Kate
Prince William and Duchess Kate arrive in New York City on Dec. 7, 2014 (Credit: CBS2)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, tour one of the reflecting pools at the National September 11 Memorial and Museum on Dec. 9, 2014, in New York City. (credit: Spencer Platt/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, tour one of the reflecting pools at the National September 11 Memorial and Museum on Dec. 9, 2014 in New York City. (credit: Spencer Platt/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, tour one of the reflecting pools at the National September 11 Memorial and Museum on Dec. 9, 2014 in New York City. (credit: Spencer Platt/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, tour one of the reflecting pools at the National September 11 Memorial and Museum on Dec. 9, 2014 in New York City. (credit: Spencer Platt/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge look on during a visit the National September 11 Memorial & Museum on Dec. 09, 2014, in New York City. (credit: Doug Mills - Pool/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Kate, Duchess of Cambridge, and Britain's Prince William view the art installation of Spencer Finch during their visit to the National September 11 Museum on Dec. 9, 2014. (credit: Richard Drew - Pool/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Kate, Duchess of Cambridge, and Britain's Prince William are escorted by Joe Daniels, president & CEO of the National September 11 Memorial & Museum in the Hall of Faces, during their visit to the National September 11 Museum on Dec. 9, 2014. (credit: Richard Drew - Pool/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, are given a tour by Joe Daniels, president and CEO of the National September 11 Memorial & Museum on Dec. 9, 2014. (credit: Richard Drew - Pool/Getty Images)
Duke And Duchess Visit National September 11 Memorial Museum
The Duke and Duchess of Cambridge visit the National September 11 Memorial & Museum on Dec. 9, 2014. (credit:(Pool Photo by Doug Mills/ The New York Times)
Duke And Duchess Visit National September 11 Memorial Museum
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, walk past the "Hall of Faces," which contains photos of those who died in the September 11 terrorist attacks, during a tour to the National September 11 Memorial & Museum on Dec. 09, 2014 in New York City. (credit:(Pool Photo by Doug Mills/ The New York Times)
Duke And Duchess Visit National September 11 Memorial Museum
The Duke and Duchess of Cambridge visit the National September 11 Memorial & Museum on Dec. 9, 2014. (credit:(Pool Photo by Doug Mills/ The New York Times)
Duke And Duchess Of Cambridge Visit The Door
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, watch a song and dance performance during a visit to The Door Dec. 9, 2014. The Door is a more than 40-year-old program that serves disadvantaged youth in New York City. (credit: Chad Rachman-Pool/Getty Images)
Duke And Duchess Of Cambridge Visit The Door
Prince William, Duke of Cambridge, and Catherine, Duchess of Cambridge, talk with students Nya Hayer and Steffon Bell as they visit The Door on Dec. 9, 2014. The Door is a more than 40-year-old program that serves disadvantaged youth in New York City. (credit: Chad Rachman-Pool/Getty Images)
Duke And Duchess Of Cambridge Visit The Door
Prince William, Duke of Cambridge, inspects a fruit snack given to him by students during a visit to The Door on Dec. 9, 2014. The Door is a more than 40-year-old program that serves disadvantaged youth in New York City. (credit: Chad Rachman-Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Carl Court/Getty Images)
St. Andrews 600th Anniversary Dinner - Inside
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the St. Andrews 600th Anniversary Dinner at Metropolitan Museum of Art on December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Richard Perry - Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Eduardo Munoz Alvarez - Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Chad Rachman - Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Inside
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the St. Andrews 600th Anniversary Dinner at Metropolitan Museum of Art on December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Richard Perry - Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Neilson Barnard/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Neilson Barnard/Getty Images)
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Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Robert Sabo - Pool/Getty Images)
St. Andrews 600th Anniversary Dinner - Arrivals
Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge arrive at Metropolitan Museum of Art to attend the St. Andrews 600th Anniversary Dinner December 9, 2014 in New York City. The event is created to support scholarships and bursaries for students from under-privileged communities and investment in the university's media and science faculties, sports centers and lectureship in American literature. (Photo by Neilson Barnard/Getty Images)
