Michelle Obama

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U.S. first lady Michelle Obama waves to the audience during a youth event at the Sci-Bono Discovery Centre, Saturday, June 29, 2013, in Johannesburg, South Africa, organized in conjunction with MTV Base, an African youth and music TV channel, and Google+ to highlight the importance of education. (AP Photo/Carolyn Kaster)

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U.S. President Barack Obama waves as he poses for a picture alongside U.S. First Lady Michelle Obama, second right, Senegalese President Macky Sall, right, and Senegalese First Lady Mariame Faye Sall at the presidential palace in Dakar, Senegal, Thursday, June 27, 2013. (AP Photo/Rebecca Blackwell)

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**FILE** First lady Michelle Obama raises her glass for a toast during a dinner at the Charlottenburg palace in Berlin on June 19, 2013. (Associated Press)

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President Obama and first lady Michelle Obama wave goodbye from Air Force One at the Tegel airport in Berlin Wednesday, June 19, 2013. Obama was for a two-day official visit to Germany. (Associated Press)

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** FILE ** Rirchard DeCoatsworth sits with first lady Michelle Obama at the president's State of the Union speech in 2009. (Associated Press)

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First lady Michelle Obama is said to be staying in the $3,300-per-night Princess Grace Suite at the five-star Shelbourne Dublin, a Renaissance Hotel, during her visit to the Irish capital. (The Shelbourne Dublin, a Renaissance Hotel, website)

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** FILE ** First lady Michelle Obama addresses the Congressional Black Caucus Foundation's 42nd annual Phoenix Awards dinner in Washington on Saturday, Sept. 22, 2012. (Associated Press)

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First lady Michelle Obama, left, gives instructions to students from Long Beach Island Grade School in Ship Bottom, N.J., as they make a pizzas made from the summer crop harvested from the White House kitchen garden, Tuesday, May 28, 2013, at the White House in Washington. (Associated Press)