Bruno Mars, Rihanna and Sting to Perform Together at Grammys To the ever-growing list of artists already scheduled to perform at the Grammy Awards on Sunday, add this unlikely combination: Bruno Mars, Rihanna and Sting. The trio will perform together during the show, the Recording Academy announced Monday, as will Kelly Clarkson. All but Sting also are nominees for awards this year. In another unusual pairing, the show will also have Sir Elton John and the 21-year-old British singer-songwriter Ed Sheeran performing together in a live setting for the first time. The Black Keys, Fun., the Lumineers and Frank Ocean will also be making their debuts as Grammy performers on the Sunday night broadcast on CBS. The ranks of Grammy presenters is also swelling, with Prince, Beyoncé, Jennifer Hudson and Jennifer Lopez now confirmed in that role. They join a list that also includes Carly Rae Jepsen and Katy Perry from the pop world; the country music stars Faith Hill, Tim McGraw and Keith Urban; and two stars of hit television series, Kaley Cuoco and Neil Patrick Harris.