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Can you guess which Hollywood hottie put her toned tummy on full display in this eye-popping ab crack snap?! Cure your Monday blues by guessing the celeb ...

She was on "Dancing with the Stars" with partner Gleb . She and her 3 sisters have their own reality TV show. As one of the most popular models in the world, no wonder she has a swanky Soho penthouse in NYC!

Hit the gallery for the reveal!

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