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First lady Michelle Obama participates in the "Bunny Pokey" song and dances with kids in the Kinderbees Activity Room at Penacook Community Center in Penacook, N.H.

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Taylor Swift accepts the big help award from Michelle Obama onstage at Nickelodeon's 25th Annual Kids' Choice Awards in Los Angeles, Calif.

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Barack Obama and first lady Michelle wait to welcome Britain's Prime Minister David Cameron and his wife Samantha to the White House prior to a State Dinner.

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Michelle Obama watches as chefs from past seasons of "Top Chef" and students take part in a cooking competition at the Kleberg Rylie Recreation Center in Dallas, Texas. The event, which helped celebrate the second anniversary of the "Let's Move!" initiative, highlighted the work being done in schools across America to provide healthier food to students.

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First lady Michelle Obama participates in a potato sack race with Jimmy Fallon in the East Room of the White House during a “Late Night with Jimmy Fallon” taping for the second anniversary of the "Let’s Move!" initiative.

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Michelle Obama has lunch with students at Parklawn Elementary School in Alexandria, Va. The first lady visited the school to sample a healthy meal that meets the United States Department of Agriculture’s new and improved nutrition standards for school lunches.

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Barack Obama and first lady Michelle smile after receiving team jerseys and bats at an event honoring the 2011 Baseball World Series Champion St. Louis Cardinals at the White House.

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Michelle Obama and Bo, the Obama family dog, greet audience members at Children’s National Medical Center in Washington, D.C.

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Michelle Obama picks up 8-month-old Cooper Wall Wagner while greeting military personnel and their families at the mess hall of Marine Base Hawaii at Kaneohe Bay on Christmas Day.

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Michelle Obama, accompanied by Santa Claus, reads "A Visit From St. Nicholas" ("The Night Before Christmas") at the Children's National Medical Center in Washington, D.C.

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Michelle Obama holds an excited toddler as she delivers toys and gifts donated by Executive Office staff to the Marine Corps' Toys for Tots campaign at Joint Base Anacostia-Bolling in Washington, D.C.

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First Lady Michelle Obama talks with (from left) Darius Rucker, Kris Kristofferson, and Lisa Meyers in the Old Family Dining Room of the White House before “The History of Country Music: From Barn Dances to Pop Charts” interactive workshop for local students.

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Guinness Book of World Records holder John Cassidy performs a balloon act for Michelle Obama in the Diplomatic Reception Room of the White House on Oct. 11, 2011.

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Michelle Obama and White House chefs join children from Bancroft and Tubman Elementary Schools to harvest vegetables during the third annual White House Kitchen Garden fall harvest on the South Lawn on Oct. 5, 2011.

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Michelle Obama reacts to something the President whispered to her at the Waldorf Astoria Hotel in between events related to the United Nations General Assembly in New York.

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President Obama, first lady Michelle and their daughters Sasha and Malia watch the World Cup soccer game between the U.S. and Japan, from the Treaty Room office in the residence of the White House on July 17, 2011.

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Michelle Obama huddles with children during a Joining Forces event with military families at Nationals Park in Washington, D.C. on July 5, 2011.

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Michelle Obama meets with former President Nelson Mandela of South Africa at Mandela's home in Houghton, South Africa on June 21, 2011.

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Michelle Obama talks with children as they have lunch at CentroNía Childcare Center in Washington, D.C. on June 8, 2011.

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First Lady Michelle Obama greets students following a Flash Mob Dance at Alice Deal Middle School in Washington, D.C. on May 3, 2011.

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Michelle Obama lifts a baby while greeting the crowd at the annual Easter Egg Roll on the South Lawn of the White House on April 25, 2011.