By ALEX UNGERMAN
February 04, 2013
It's official! Rihanna will join the already star-studded list of performers at Sunday's Grammy Awards, where she's set to take the stage with fellow superstars Bruno Mars and Sting for a special collaboration. The Grammy Awards air live from the Staples
Center in Los Angeles on Sunday, February 10 on CBS at 8 p.m. ET.
Click through to see the other confirmed acts!