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Karina Smirnoff's toned tummy is proof that dancing does a body good.

The Dancing With the Stars pro, who is paired this season with singer Gavin DeGraw, left a grueling day of practice with a smile. If our abs looked that good, we'd be smiling, too!

Looks like Karina soothed those sore muscles with Bengay Zero Degrees. Whatever it takes to get that mirror ball trophy!