In it to win it! Nothing like some friendly competition for these celebrities. See stars -- including Beyonce, Jimmy Fallon, and Jennifer Lopez -- who've kicked up their heels for some of the most hilarious dance-offs ever
Ellen DeGeneres vs. Jennifer Lopez
The TV personality and Jenny from the Block showed off their dance moves during an episode of DeGeneres' eponymous talk show in June 2011. The women competed in a dance-themed game of charades in front of a live audience—and Lopez won!