WASHINGTON--First Lady Michelle Obama lets loose, showing off all her dancing moves during one of her segments on NBC's "Late Night with Jimmy Fallon," taping the show Friday to be broadcast tonight. Mrs. Obama is dancing with Fallon, dressed as a woman in a dance skit titled "Evolution of Mom Dancing" and it is hilarious.

"We have one of the best shows we've ever done tonight with the @FLOTUS Michelle Obama, Scarlett Johansson and @TheAvettBros. #LateNight," Fallon said in a Tweet.

We have one of the best shows we've ever done tonight with the @flotus Michelle Obama, Scarlett Johansson and @theavettbros. #LateNight

— jimmy fallon (@jimmyfallon) February 22, 2013