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Dancing with the Stars Workout

Get on the ball! "It's great to hop on the yoga ball and do some crunches," Kym says. "I think it's one of the best things you can have in your home. You really feel a workout on that ball."

On Kym: Tank, $49, and pants, $69, bebe Sport; Bebe Sport, Beverly Hills, (310-246-0381). Shoes, Asics, $180; asicsamerica.com