What Feud? Christina Aguilera & Lady Gaga Duet on 'The Voice'

The winner of The Voice Season 5 wasn't much of a surprise. As Blake Shelton predicted, the victor turned out to be the season-long frontrunner, Jamaican singer Tessanne Chin -- who was coached by Adam Levine. But producers did have an actual surprise up their sleeves for the finale: A duel performance by Lady Gaga and Christina Aguilera. In matching metallic finery and big, peroxide-blonde hair, the pair belted out Gaga's song "Do What U Want" and cozied up together on a couch. (Gaga recorded the song with R. Kelly.) Watch here:

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