Top fashion moments of 2011

Rihanna made news for one thing or another all year long, wearing interesting clothes (or wearing not enough clothes, which got her booted from a farmer's field in Ireland during a video shoot). She launched her first perfume, modeled for Armani (for whom she also designed a small capsule collection) and was on the cover of Vogue -- a cover, it should be noted, that, along with one featuring Lady Gaga, was credited with helping the magazine increase sales in the first half of the year.