Stacy Keibler Shows Off Sexy Six-Pack Amidst Pregnancy Rumors

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Despite reports to the contrary, Stacy Keibler isn't carrying George Clooney's child — as her first official Instagram photo proves.

Though the model, 32, hasn't addressed the pregnancy rumors herself, a source tells TMZ they are "100% false." And on June 20, Keibler — who is vacationing in Como, Italy with Clooney, 51, at his famed estate — uploaded a photo of herself in the gym. With a dumbbell in hand, the model showed off her sexy, sweaty six-pack abs in a white sports bra and black yoga pants.

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To get her bangin' bod, Keibler constantly changes her workout routine. "I go to Barry's Bootcamp, I go to Physique 57 — every week is different for me," she told Us Weekly earlier this year. "Sometimes I'll go to Barry's three times a week because it fits into my schedule better, and sometimes I'll work out with a trainer five times a week."

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She added: "I also like boxing. That's an amazing workout. . . Summer is when I start getting in the groove of at least once or twice a week mixing in something like boxing. I just like to mix it up."

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Keibler, a former Baltimore Ravens cheerleader, has always been athletic. "I started dancing and playing sports at a young age, and then I got into cheerleading and I've always had that," she told Us. "But even at 15 I was going to the gym. I've just always been conscious of being healthy and I'm really very balanced. I like to eat a lot so I have to work out a lot to balance it out."

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