Christina Aguilera, Cee Lo Green, country star Blake Shelton and Adam Levine have formed a supergroup for their new TV talent show The Voice.
The quartet previewed the new show, which debuts next week (26Apr11), on Wednesday (20Apr11) - and performed Gnarls Barkley's Crazy.
Aguilera belted out the number with Green, who first scored the hit, while Levine drummed and provided backing vocals and Shelton played guitar.