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Michelle Obama Fitness

First lady Michelle Obama and Bob Harper of Biggest Loser, right in blue shirt, do the Interlude dance during a Let's Move event with children from Iowa schools, Thursday, Feb. 9,, 2012, at the Wells Fargo Arena in De Moines, Iowa, during her three day national tour celebrating the second anniversary of Let's Move. (AP Photo/Carolyn Kaster)

Credit: AP