Michelle Obama Pictures

First Lady Michelle Obama participates in an interview with Olivier Knox for Yahoo during the "Let's Move!" initiative third anniversary tour at McCormick Place in Chicago, Ill., Feb. 28, 2013.

First Lady Michelle Obama and Rachael Ray talk with students at Eastside and Northside Elementary Schools in Clinton, Miss., Feb. 27, 2013. The Clinton Public School District in Mississippi mobilized the entire community to make healthy schools a top priority and implemented district-wide changes to bring physical activity and nutritious choices to students – all with no additional funding.

First Lady Michelle Obama and Rachael Ray look at the “Let’s Move! Cafeteria Cook Off” kick off competition trophy on display at Eastside and Northside Elementary Schools in Clinton, Miss., Feb. 27, 2013.

First Lady Michelle Obama signs artwork done by the students of Eastside and Northside Elementary Schools in Clinton, Miss., Feb. 27, 2013.

First Lady Michelle Obama and Rachael Ray talk with students at Eastside and Northside Elementary Schools in Clinton, Miss., Feb. 27, 2013. The Clinton Public School District in Mississippi mobilized the entire community to make healthy schools a top priority and implemented district-wide changes to bring physical activity and nutritious choices to students – all with no additional funding.

First Lady Michelle Obama and Jimmy Fallon perform "The Evolution of Mom Dancing" skit for an episode of “Late Night with Jimmy Fallon,” at the 30 Rock Studios in New York, N.Y., Feb. 22, 2013. Mrs. Obama previously appeared on the show in 2011, when she faced off with Fallon for a fitness challenge taped at the White House to celebrate the second anniversary of "Let’s Move!"

President Barack Obama, First Lady Michelle Obama, and daughters Sasha and Malia, center, join extended family for a group photo in the Blue Room of the White House on Inauguration Day, Sunday, Jan. 20, 2013. Joining the First Family from left are: Craig Robinson, Leslie Robinson, Avery Robinson, Marian Robinson, Akinyi Manners, Auma Obama, Maya Soetoro-Ng, Konrad Ng, Savita Ng, and Suhaila Ng.

First Lady Michelle Obama, along with Robin Roberts and chef Marcus Samuelsson, participates in a “Good Morning America” cooking segment at the GMA Studios in New York, N.Y., Feb. 22, 2013. The segment highlighted a new "Let’s Move!" partnership that makes finding healthy, reliable recipes easy for busy parents.