Best Dressed 2012

Stars Who Brought Sexy Back

This year's hottest trend? Daring to bare your backside! From Julianne Hough to Anne Hathaway, see who took the plunge

RACHEL MCADAMS

Proving you don't need a fancy gown to make a statement, the star mixes sexy and sweet in a floral frock that gets heads turning at the London premiere of Morning Glory.