JENNY MCCARTHY, 40
Just 21 when Playboy named her 1994's Playmate of the Year, McCarthy bared all again in 2012 to mark her 40th birthday. That takes guts and an amazing body, which McCarthy has in spades. But the host of The Jenny McCarthy Show also lives as purely as possible, she told Shape, and sticks to a diet full of fish, egg whites, fruits and vegetables. She also credits "Botox, working out and spray tanning" as part of her beauty regimen. Clearly, it's working!