Rihanna arrives at the GQ Men of the Year Party at Chateau Marmont on Nov. 13, 2012, in Los Angeles. / Getty
When stars gather for Music's Biggest Night on Sunday, they will be serenaded by Bruno Mars, Rihanna and Sting, who have just signed on for a special Grammy performance. Also new to the performance bill is Kelly Clarkson.
Hot off her Super Bowl halftime show, 16-time Grammy winner Beyonce will appear as a presenter, as well as Prince, Jennifer Lopez and actor Pauley Perrette.
Clarkson has three nominations: record of the year, best pop solo performance for "Stronger (What Doesn't Kill You)" and best pop vocal album for "Stronger."
Mars, meanwhile, is up for best rap song for "Young, Wild & Free."
LL Cool J will host the 55th annual ceremony, which will also include performances by Dierks Bentley and Miranda Lambert, The Black Keys, fun., The Lumineers, Mumford & Sons, Frank Ocean, Rihanna, Taylor Swift, Carrie Underwood, Jack White, Elton John, Ed Sheeran, Alicia Keys, Maroon 5 and Justin Timberlake.
Previously announced presenters include Carly Rae Jepsen, Katy Perry, Kaley Cuoco, Neil Patrick Harris, Faith Hill, Tim McGraw and Keith Urban.
The Grammy Awards will broadcast live Sunday on CBS, starting at 8 p.m. ET. Go here for all the details on this year's event.