‘The Voice’ Finale Taps Rihanna, Kelly Clarkson, Bruno Mars and the Killers

Two-hour season finale of "The Voice" will air Dec. 18

The season finale of "The Voice" has enlisted some high-profile talent to help send the show's third cycle off with a bang.

Getty ImagesRihanna, Kelly Clarkson, Bruno Mars and The Killers have been tapped to perform on the two-hour extravaganza, which will culminate with the crowning of a new champion, NBC said Wednesday.

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An additional special guest will be named at a later date, the network added.

Rihanna will perform her song "Diamonds," while "American Idol" alum Clarkson — who has served as a guest mentor on the show, as well as hosting the rival singing competition "Duets" — is set to sing "Catch My Breath."

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The Killers, meanwhile, will play their single "Runaways," and Mars will debut the song "When I Was Your Man" from his sophomore album "Unorthodox Jukebox," which was released Tuesday.

The season finale of "The Voice" will air live on Dec. 18 at 8 p.m.