![Christina Aguilera, Cee Lo Green, Adam Levine And Blake Shelton Sing “Crazy” To Promo The Voice [Video]](http://townsquare.media/site/14/files/2011/04/The-Voice-Crazy.jpg?w=980&q=75)
Christina Aguilera, Cee Lo Green, Adam Levine And Blake Shelton Sing “Crazy” To Promo The Voice [Video]
JENNIFER LOPEZ and STEVEN TYLER are supposedly going to perform on "American Idol" this season, but NBC's new singing competition "The Voice" has the jump on them. BTW "The Voice" premieres next Tuesday. "Voice" coaches Christina Aguilera, CEE LO GREEN, Adam Levine and country singer Blake Shelton all got on stage to perform the Gnarls Barkley song "C