Michelle Obama shows off her dance moves

First lady Michelle Obama dances with students at Alice Deal Middle School in northwest Washington, Tuesday, May 3, 2011, during a surprise visit for the school's Let's Move! event. (AP Photo/Manuel Balce Ceneta)
AP Photo/Manuel Balce Ceneta

First Lady Michelle Obama made a surprise appearance at a D.C. middle school on Tuesday - and showed off some of her dance moves ("The Dougie" included) in a flash workout to Beyonce's "Move Your Body."

During the appearance, which was in conjunction with her anti-obesity "Let's Move" campaign, Obama joined 500 students in the national simulcast of a choreographed dance routine to the pop song, a Beyonce song that she rewrote expressly for the initiative.

(Beyonce also took part in the flash workout: about 85 students were in the middle of performing the routine at a Harlem, New York school when the pop star dropped in and joined them.)

"Beyoncé is one of my favorite performers on the planet. And when she agreed to remake her video and do this 'Let's Move' flash workout, I was so excited, because this is what we've been talking about -- that exercise and moving can be fun," Obama said in her remarks at D.C.'s Alice Deal Middle School. "It's about dancing, it's about moving."

Watch Beyonce's video for the workout song below.