Pictures of Rihanna, Cee-Lo Green, Justin Bieber, Avril Lavigne, Mark Ronson at the 2011 Brit Awards

The Brit Awards took over London last night, with many of music's biggest names making their way to England after spending their weekend in LA for the Grammys. Rihanna was on hand in a new crop of sexy stage outfits to perform a medley of her hits and also accept the best international female solo artist honor during the star-studded show — check out the full list of the evening's winners. Justin Bieber led the hot guys on the red carpet, while Cee-Lo Green was on hand to do another duet. The fun continued for the celebs as they made the afterparty rounds, and PopSugar UK managed to pick their top 10 moments from the big event.