LOS ANGELES (AP) – Bruno Mars, Rihanna and Sting are joining forces for a special Grammy performance. Kelly Clarkson has also been added as a performer. Sunday’s entertainment will also include Dierks (DURKS) Bentley and Miranda Lambert, Elton John and Ed Sheeran, Alicia Keys and Maroon 5, Justin Timberlake, The Black Keys, fun., Jack White, Carrie Underwood, Taylor Swift, The Lumineers, Frank Ocean, and Mumford and Sons.