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Boo! After her smokin' hot Super Bowl outfit (and performance!) we were expecting Beyonce Knowles to bring a little Sasha Fierce to the 2013 Grammy Awards tonight, but it looks like she heeded CBS' warning about overly sexy attire.

Beyonce wore an Osman black and white crepe jumpsuit with a Swarovski clutch and Lorraine Schwartz jewelry, and while she's not snagging a spot on any best dressed lists, she did score an award tonight for Best Traditional R&B Performance for her tune “Love on Top” during the pre-show. Congrats!