Look Great in '09

MARIAH CAREY

The singer has been showing off a tighter, toned body – thanks to her regime of water aerobics – and changed her diet, even taking Oprah Winfrey on a tour of her refrigerator. Part of Carey's new meal plan? Baked clams, rice, berries, swordfish and vegetable soup – "Always a winner," she says. "You can eat as much of this as you want and you won't gain one pound!"