Michelle Obama at the Olympics

First lady Michelle Obama of the United States cheers during watches the men's basketball game between the United States and France at the London 2012 Olympic Games at Basketball Arena on July 29, 2012, in London.

First lady Michelle Obama hugs head coach Mike Krzyzewski of the United States after the victory against France during their men's basketball game at the London 2012 Olympic Games at the Basketball Arena on July 29, 2012, in London.

First lady Michelle Obama talks with Kobe Bryant after their men's basketball game between the United States and France at the London 2012 Olympic Games at the Basketball Arena on July 29, 2012, in London.

First lady Michelle Obama of the United States watches the men's basketball game between the United States and France at the London 2012 Olympic Games at the Basketball Arena on July 29, 2012, in London.

First lady Michelle Obama hugs Kevin Durant after their men's basketball game between the United States and France at the London 2012 Olympic Games at the Basketball Arena on July 29, 2012, in London.

James Harden of the U.S. Men's basketball team is congratulated by first lady Michelle Obama after the team won, 98-71, against France at the London 2012 Olympic Games on July 29, 2012, in London.

Anthony Davis of the U.S. Men's basketball team is congratulated by first lady Michelle Obama after the team won, 98-71, against France at the London 2012 Olympic Games on July 29, 2012, in London.

U.S. basketball players are congratulated by first lady Michelle Obama after they won, 98-71, against France at the London 2012 Olympic Games on July 29, 2012, in London.

First lady Michelle Obama cheers during the men's basketball game between the U.S. and France at the London 2012 Olympic Games on July 29, 2012, in London.

First lady Michelle Obama talks with Summer Sanders durng the evening session of the swimming at he London 2012 Olympic Games at the Aquatics Centre on July 28, 2012, in London.

First lady Michelle Obama stands during the playing of the national anthem in the swimming competition at the London 2012 Olympic Games on July 28, 2012, in London.

First lady Michelle Obama supports the USA Olympic Swim during the evening session of the swimming games at the London 2012 Olympic Games at the Aquatics Centre on July 28, 2012, in London.

First lady Michelle Obama supports the USA Olympic Swim team along with Summer Sanders during the evening session of the swimming at the London 2012 Olympic Games at the Aquatics Centre on July 28, 2012, in London.

Firsl Lady Michelle Obama sits next to Dominique Dawes as they attend the women's singles tennis match between Serbia's Jelena Jankovic and Serena Williams during the London 2012 Olympic Games at the All England Tennis Club in Wimbledon, southwest London, on July 28, 2012.

First Lady Michelle Obama plays tennis with children as part of her "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays with children as part of her "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays with children during the "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays with children during "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays with children as part of her "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays tennis with children as part of her "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First Lady Michelle Obama plays with children as part of her "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the start of the London 2012 Olympic Games.

First lady Michelle Obama and David Beckham celebrate at the "Let's Move London" event at the American ambassador's residence, Winfield House, Regents Park, on July 27, 2012 in London.

First lady Michelle Obama jogs to the stage to speak during "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First ladyMichelle Obama, center, kicks a football as Peter Schmeichel, left, and David Beckham look on at a "Let's Move London" event at the American ambassador's residence, Winfield House, Regents Park, on July 27, 2012, in London.

David Beckham, Nickelodeon's Spongebob Squarepants, Brandi Chastain and First lady Michelle Obama celebrate the "'Let's Move London" event at the American ambassador's residence, Winfield House, Regents Park, on July 27, 2012, in London.

First lady Michelle Obama, center, celebrates as Peter Schmeichel, left, and David Beckham, right, look at a "Let's Move London" event at the American ambassador's residence, Winfield House, Regents Park, on July 27, 2012 in London.

U.S. wrestler Elena Pirozhkova picks up first lady Michelle Obama during her visit to the Olympic training center on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First lady Michelle Obama arrives for a reception at Buckingham Palace before the Olympics Opening Ceremony on July 27, 2012, in London.

First Lady Michelle Obama speaks during a "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First lady Michelle Obama, right, is applauded by British footballer David Beckham during a "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

First lady Michelle Obama poses with U.S. athletes during "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the start of the London 2012 Olympic Games.

First lady Michelle Obama and US Ambassador Louis Susman, left, meets Catherine, Duchess of Cambridge, during a reception at Buckingham Palace on July 27, 2012, in London.

First lady Michelle Obama and U.S. Ambassador meet Queen Elizabeth II during a reception at Buckingham Palace on July 27, 2012, in London.

First lady Michelle Obama celebrates after kicking a ball to goal as British footballer David Beckham applauds during the "Let's Move-London" event at the Winfield House in London on July 27, 2012, hours before the official start of the London 2012 Olympic Games.

London 2012 Olympics in pictures