Bruno Mars Performs On The Finale Of The Voice

Bruno Mars helped close out season three of NBC's The Voice with a performance of his current single, "When I Was Your Man." Mars was joined by a host of guests, including Avril Lavigne, Kelly Clarkson, the Killers, Peter Frampton and Smokey Robinson.

Cassadee Pope was the big winner on the night, however, beating out stiff competition from runner-up Terry McDermott third place finisher Nicholas David. During the show, Pope was joined by the Killers for a rendition of their track "Here with Me," and Lavigne for a rendition of her hit "I'm with You."

To wrap the season, the show's judge/mentors Christina Aguilera, Cee Lo Green, Blake Shelton and Adam Levine performed the Green Day hit "Good Riddance."

Bruno's sophomore release, Unorthodox Jukebox, hit last week.

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