Jenny McCarthy’s 10 Best Bikini Moments!

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 Binns Johnstone/Pacificcoastnews.com

At 39-years-old, Jenny McCarthy's still got it goin' on.

The buxom blonde, who celebrates her birthday Tuesday, is known for her sizzlin' bikini body — but it doesn't come easily.

PHOTOS: JENNY MCCARTHY'S 10 BEST BIKINI MOMENTS

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"I'll be really into health and then I'll be out of health, usually depending on when the McRib is back," Jenny McCarthy joked to Us Weekly in 2010. "I can't even balance a checkbook, let alone my calorie intake."

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To stay fit, the Illinois native runs on the treadmill twice a week and does Bikram yoga three times a week. "I hate cardio even though I do it once in a while," she told Us. "Bikram yoga helps you zen out while using every single one of your muscles without having to lift weights."

PHOTOS: More sexy stars in bikinis

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McCarthy's other secret for looking trim on the beach? "I swear to God, it's 10 days of soup. I just always stick to that," she says. "The soups really do make you feel like you're having a full meal. I have the Montel Williams soup maker. I'm a soup-a-holic."

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