The 10 prettiest dresses of 2012

(InStyle.com) -- What better way to wrap up 2012 than with a look back at the year's loveliest dresses? Whether soft and sweet like Keira Knightley's pastel Erdem gown, a complete knockout like the Lanvin mini Emma Stone wore, or something in between like Catherine, Duchess of Cambridge's bold and romantic Jenny Packham stunner, these 10 red carpet picks have one thing in common: they're just plain stunning! View Photo's Click Here