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"Late Night" host Jimmy Fallon visited the White House last week to take on first lady Michelle Obama in a "Let's Move!" fitness challenge.
Besides "Late Night with Jimmy Fallon," Mrs. Obama has also appeared on "The Tonight Show With Jay Leno," "The Ellen DeGeneres Show" and "Rachael Ray" to celebrate the second anniversary of her campaign against childhood obesity.
Watch the race to see how Mrs. Obama won.