Look Great, Feel Good in 2013

They Do What? 10 Outrageous Star Fitness Tricks

Who stands on her head? Who drinks vinegar? Celebs reveal their wackiest secrets

KATY JUMPS ROPE

Katy Perry stays fit by embracing her inner schoolgirl. "I hate working out, but I love jumping rope," says the "Waking Up in Vegas" singer. "There's a rhythm. It's like dancing." And she's no schoolyard novice. "I can double jump; I can cross. I can do all of it. I look like Rocky when I jump rope." Besides being fun, a 130-lb. woman jumping rope at a fast pace can burn more than 350 calories!