Ellen DeGeneres [1] is known for her dance moves, but add Michelle Obama to the mix [2] and the pair really brought down the house during The Ellen DeGeneres Show on Friday. The first lady stopped by the show to talk about the fifth anniversary of her "Let's Move!" campaign, an initiative to get the public to lead healthier lives. During her appearance, she announced that this year, for the first time, So You Think You Can Dance all-stars will take over the White House Easter Egg Roll to teach a dance to "Uptown Funk." Michelle joked that she's been practicing the choreography, which prompted Ellen to say, "I've been practicing somewhat. I'm very busy. Very, very busy, and I'm not really good at choreography. I'm more of a freestyle kind of street dancer." The host then challenged the first lady to a dance-off, and what happened next will get everyone on their feet. Watch Michelle and Ellen break it down with their best hip thrusts, then check out more viral videos [3], including President Obama reading mean tweets [4] about himself.