To start Season 5 off with a bang, not only has The Voice brought back all their original judges, they've put an awesome performance in there too. But, this time it's the judges performing. Banding together, Blake Shelton, Christina Aguilera, Cee Lo Green, and Adam Levine jam out to the hit "I Love Rock N' Roll." Check out the awesome video of it above.
— The Voice (@NBCTheVoice) September 24, 2013