There's a reason so many celebs lose weight while competing on Dancing With the Stars — dancing is hard work. You can blast calories while you boogie down with Mark Ballas in our latest video. The dance pro and two-time winner of the competition is here to teach you a bit about the cha-cha, which he will surely be dancing with his new partner, Bristol Palin. Time to put on your dancing shoes and strut your stuff.
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