Winter's Hottest Celeb Beach Bods

Julianne Hough, Rosie Huntington-Whiteley, Cameron Diaz and more are turning up the heat with their sexy swimwear – and toned physiques!

OLIVIA PALERMO

The svelte reality star proves that her fashion smarts extend even to swimwear, wearing a black cutout top and string bikini to cool down in St. Barts.