Rihanna, Bruno Mars to Perform on 'The Voice' Finale

“The Voice” is calling on two of music’s biggest stars to help close out the season. Rihanna and Bruno Mars have been tapped to perform on the finale of NBC’s hit singing competition.

The superstar singers, along with “The Voice” mentor Kelly Clarkson, will take the stage when a winner is crowned on the two-hour finale on Tuesday, December 18, at 8 p.m.

RiRi will reportedly perform her hit single “Diamonds,” while Bruno will debut “When I Was Your Man” off his new album Unorthodox Jukebox.

Bruno dethrones Rihanna on the Billboard Hot 100 this week as his single “Locked Out of Heaven” rises to the No. 1 spot.