July 30th is the second annual National Dance Day and we can't wait to get up and dance. Founded by So You Think You Can Dance executive producer Nigel Lythgoe in 2010, National Dance Day encourages Americans to incorporate dance into their lives as a way to have fun, get your heart rate up, and combat obesity. We were so excited about the new holiday we called up the biggest dance enthusiast we know: So You Think You Can Dance judge Mary Murphy. We found out how she's celebrating and how you can too!

Our favorite So You Think You Can Dance judge will be at the National Mall in Washington DC leading a beginner salsa routine along with Gev from season 4 of SYTYCD and Kristi Yamaguchi. But don't worry, you don't have to be in DC to get in on the fun, SYTYCD flash mobs will be taking place all over the country. Log on to to see instructional videos of three routines. SYTYCD's dynamic duo Tabitha and Napoleon are leading the advanced routine to LMFAO's "Party Rock Anthem," the Pussycat Dolls founder Robin Antin choreographed the intermediate dance, and everyone's favorite hot tamale choreographed the beginner routine. "Everybody can do it. I've shown a few people who can't dance. It took them a few times but they got it," says Murphy. And, even if you don't live near one of the participating cities you can still learn the routines and submit a video to be aired on So You Think You Can Dance. So what are you waiting for? Get up and dance!