PHOTOS: Rihanna Pulls Double Fashion Duty For Grammys

Rihanna is not only a musical trend-setter, but one in the fashion world as well, as the Caribbean Queen proved Sunday night at the Grammy award show and after-party in Los Angeles, where she sported two memorable outfits.

For the Grammys, she dazzled in an elegant, off-the-shoulder dress from the Viktor & Rolf Spring 2010 collection with her hair styled up, showcasing her high forehead.

The Disturbia singer dressed not-so-demure at the after-party at West Hollywood's Guys And Dolls, as she showcased her flawless, taut figure in a slinky sliver number.

For the Umbrella singer, the occasion marked the dark anniversary of the beating she received at the hands of her ex, R&B heartthrob Chris Brown, February 8, 2009 following a pre-Grammy party in Los Angeles. Brown was sentenced to five years' probation and ordered to do 180 days of community labor as a part of the plea deal he made last June for assaulting the Barbadian superstar; a restraining order requires him to keep his distance from her for five years.