First lady Michelle Obama walks through the Capitol on her way to the presidential inauguration ceremonies in Washington, Jan. 21, 2013.
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From left, Jimmy Fallon, actor Will Ferrell, and first lady Michelle Obama perform during the 'Ew' skit on 'The Tonight Show' Feb. 20, 2014, during Mr. Fallon's inaugural week as the show's new host.
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Artist Trey Speegle (l.) photographs first lady Michelle Obama as she prepares to autograph his color-by-numbers mural featuring the slogan for WAT-AAH!, a line of bottled water targeted to the youth market, at the New Museum in New York, Feb. 20, 2014.
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Pete Souza/The White House/Reuters
First lady Michelle Obama announces the Best Picture Oscar goes to 'Argo.' She spoke live from the Diplomatic Room of the White House in Washington, Feb. 24, 2013. The Oscar appearance, coming on the heels of the 'mom dance' that she did with late-night comedian Jimmy Fallon, sparked debate on the proper role of a first lady.
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First lady Michelle Obama runs a 40-yard sprint during the Let's Move! Campaign and the NFL's Play 60 Campaign festivities with area youths, to promote exercise and fight childhood obesity, in New Orleans, Sept. 8, 2010. Recent changes put in place by the food industry are in response to the campaign against childhood obesity that Mrs. Obama began three years ago.
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H. Scott Hoffmann/News & Record/AP
First lady Michelle Obama reaches to guests after her speech in Fleming Gymnasium at the University of North Carolina campus, Wednesday, Aug. 1, 2012, in Greensboro, N.C.
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President Barack Obama kisses the head of first lady Michelle Obama (l.) after kissing her for "Kiss Cam" in the second half while attending the Olympic men's exhibition basketball game between Team USA and Brazil, July 16, 2012, in Washington. Team USA won 80-69.
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Pete Souza/White House/AP
President Obama, accompanied by first lady Michelle Obama, makes a phone call from the Capitol in Washington on Jan. 24, 2012, immediately after his State of the Union message, informing John Buchanan that his daughter Jessica was rescued by US Special Operations Forces in Somalia.
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Erik S. Lesser/AP
First lady Michelle Obama thanks the graduates after she delivered the commencement address during the Spelman College graduation on Sunday, May 15, 2011, at the Georgia International Convention Center in College Park, Ga.
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America's first lady Michelle Obama comforts a woman overcome with emotion as she greeted her at a multigenerational women leaders luncheon at the Sanitas Tea Garden in Gaborone, Botswana, on June 24, 2011.
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Melanie Stetson Freeman/Staff
First lady Michelle Obama and second lady Jill Biden visit with military families at a barbecue before a NASCAR race in Homestead, Fla., on Nov. 20, 2011.
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In this image made from video, first lady Michelle Obama (center r.) stands with her arm around Britain's Queen Elizabeth II during a reception at Buckingham Palace, in London on April 1, 2009, for leaders of the G20 summit.
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First lady Michelle Obama hugs children after reading a book at Mary's Center in Washington, Feb. 10, 2009.
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US first lady Michelle Obama stands with her mother, Marian Robinson (l.), and daughters Sasha and Malia as they listen to former resident Noor Ebrahim as they visit the District Six museum, in Cape Town, South Africa, on June 23, 2011.