More performers are announced for this Sunday's 55th Annual Grammy Awards, hosted by LL Cool J. Current Grammy nominees Bruno Mars and Rihanna will be teaming up with 16-time Grammy winner Sting for a special performance and current nominee Kelly Clarkson has also been inked to sing. They join previously announced performers Dierks Bentley and Miranda Lambert, Justin Timberlake, The Black Keys, fun., The Lumineers, Mumford & Sons, Frank Ocean, Taylor Swift, Carrie Underwood, Jack White and a special duet with Elton John and nominee Ed Sheeran. Presenters include Beyoncé, Prince, Hunter Hayes, Jennifer Lopez, Carly Rae Jepsen, Katy Perry, Keith Urban, Faith Hill and Tim McGraw.

The 55th Grammy's happens live this Sunday from Staples Center in Los Angeles and rolls from 8-11:30pm on CBS. Go to Grammy.com for more info.