Former vice-president Al Gore makes a funny face as he plays with Jessica Guzman after the grand opening ceremony of Echo Park on April 30, 2003, in New York City. (credit: Stephen Chernin/Getty Images)
Silvio Berlusconi
Italian Prime Minister Silvio Berlusconi (L) jokes with Russian President Vladimir Putin during a joint press conference in Lipetsk, some 400 km south of Moscow, 21 April 2004. (credit: MAXIM MARMUR/AFP/Getty Images)
Al Franken
Al Franken attends night two of the Republican National Convention August 31, 2004, at Madison Square Garden in New York City. (credit: Justin Sullivan/Getty Images)
Gordn Brown
British Prime Minister Gordon Brown, right, shares a joke with Tessa Jowell, Minister for the Olympics, as they attend the fourth day of the annual Labour Party Conference, in Bournemouth, in southern England, on Sept. 26, 2007. (credit: Leon Neal/AFP/Getty Images)
The Dalai Lama
The Dalai Lama (R) shares a joke with British Member of Parliament Chris Mullin during a press conference in Westminster, London, on May 21, 2008. (credit: KIRSTY WIGGLESWORTH/AFP/Getty Images)
Rudy Giuliani
Former New York City Mayor Rudy Giuliani laughs on day three of the Republican National Convention (RNC) at the Xcel Energy Center on Sept. 3, 2008, in St. Paul, Minn. (credit: Chip Somodevilla/Getty Images)
Nancy Pelosi & Rahm Emanuel
Rahm Emanuel (R) whispers in the ear of Speaker of the House Nancy Pelosi during a press conference at the Capitol in Washington on October 3, 2008. (credit: NICHOLAS KAMM/AFP/Getty Images)
Sarah Palin
Sarah Palin shares a laughter with supporters at the end of a campaign rally on Oct. 4, 2008. (credit: JEWEL SAMAD/AFP/Getty Images)
Mahmoud Abbas & Condoleezza Rice
Palestinian president Mahmoud Abbas (R) and Condoleezza Rice (L) laugh as they walk together after their meeting in the West Bank city of Ramallah on November 7, 2008. (credit: TARA TODRAS-WHITEHILL/AFP/Getty Images)
Barack Obama
President Barack Obama (L) and the Foreign Minister of El Salvador, Marisol Argueta, share a laugh during the first plenary session of the 5th Summit of the Americas in Port of Spain, on April 18, 2009. (credit: MAURICIO DUENAS/AFP/Getty Images)
Arnold Schwarzenegger
California Gov. Arnold Schwarzenegger (C) lifts a charred dumbbell as U.S. Rep. Adam Schiff (L) (D-CA) and California State Insurance Commissioner Steve Poizner (R) look on while touring homes that were burned by the Station Fire September 3, 2009 at Vogel Flats near Tujunga, California. (credit: Justin Sullivan/Getty Images)
Barack Obama & Hillary Clinton
President Barack Obama shares a laugh with Secretary of State Hillary Clinton as he arrives to address a joint session of Congress on his embattled healthcare reform plan at the US Capitol in Washington, D.C., on September 9, 2009. (credit should read JEWEL SAMAD/AFP/Getty Images)
Bill Clinton
Former President Bill Clinton (L) laughs with actor Brad Pitt while discussing post-Katrina New Orleans at the Clinton Global Initiative (CGI) September 24, 2009 in New York City. (credit: Mario Tama/Getty Images)
Rahm Emanuel
Rahm Emanuel makes a funny gesture ahead of the inauguration of Barack Obama as the 44th President of the United States of America on the West Front of the Capitol January 20, 2009, in Washington, D.C. (credit:TIMOTHY A. CLARY/AFP/Getty Images)
Angela Merkel
German Chancellor Angela Merkel and German Foreign Minister and vice-chancellor Guido Westerwelle share a laugh as they attend a session at the Bundestag lower house of parliament on January 19, 2010 in Berlin. (credit: AXEL SCHMIDT/AFP/Getty Images)
Nancy Pelosi
U.S. House Speaker Nancy Pelosi laughs during a night news conference on health care reform on Capitol Hill in Washington, March 22, 2010. (credit: YURI GRIPAS/AFP/Getty Images)
Joe Biden & Barack Obama
President Barack Obama (R) laughs alongside US Vice President Joe Biden prior to signing the healthcare insurance reform legislation during a ceremony in the East Room of the White House in Washington, DC, March 23, 2010. (credit: SAUL LOEB/AFP/Getty Images)
Hillary Clinton
This combination of photos shows Secretary of State Hillary Clinton and Pakistani Foreign Minister Makhdoom Shah Mehmood Qureshi laughing during a press briefing following their bilateral meeting at the Department of State in Washington, D.C., on March 24, 2010. (credit: JEWEL SAMAD/AFP/Getty Images)
Barack Obama & Angela Merkel
Secretary of State Hillary Clinton and Israeli Defense Minister Ehud Barak laugh as they speak to reporters following a bilateral meeting at the State Department in Washington, DC, April 27, 2010. (credit: SAUL LOEB/AFP/Getty Images)
Hillary Clinton
Secretary of State Hillary Clinton and Israeli Defense Minister Ehud Barak laugh as they speak to reporters following a bilateral meeting at the State Department in Washington, DC, April 27, 2010. (credit: SAUL LOEB/AFP/Getty Images)
Charles Rangel
Treasury Secretary Timothy Geithner (L) talks with New York Democrat Representative Charles Rangel (R) prior to an event honoring the New York Yankees as 2009 World Series champions of Major League Baseball with US President Barack Obama in the East Room of the White House in Washington, D.C., April 26, 2010. (credit: SAUL LOEB/AFP/Getty Images)
