Stability Balls Create Shapely Behinds

According to celebrity trainers who work with the Hollywood stars, stability balls will help give you a butt like Heidi Klum or Kate Hudson. Or at least send you down the right path toward it.

Celebrity trainers swear by a move called "stability ball prone scissors." Here's how to do it:

1. Lie face down with your hips resting on a stability ball, hands and feet on the floor for balance.

2. Walk your feet out behind you so your legs form a wide "V."

3. Slowly lift both of your feet about 12 inches off the floor and squeeze them together.

4. Lower your toes back down to the floor, spreading them into a "V" shape at the bottom of the move, and repeat for a total of 15 to 20 reps.