Blake Shelton joins his fellow famous coaches on 'The Voice' -- Cee Lo Green, Christina Aguilera and Adam Levine from Maroon 5 -- for an all-star performance of Gnarles Barkley's 'Crazy' in a special preview video released by NBC to promote the show's April 26 premiere.

Considering that Green is one half of Gnarles Barkley, and that the other two stars are much more at home in the pop world of 'Crazy,' it's pretty impressive that Shelton more than held his own during the performance. We're assuming that country music will have its day on this show soon, and his co-stars will have to do their best to shine on one of Blake's songs -- maybe 'Hillbilly Bone' or 'She Wouldn't Be Gone.'

'The Voice' features Shelton and the other three celebrities each picking and training a team of amateur singers to compete against each other in singing competitions. The winner will receive $100,000 and a record deal. In order for the coaches to focus on vocal talent and not image initially, they will be seated facing away from each new singer as they make their entrance on the show.

It seems Shelton's already impressing his fellow coaches backstage, with Levine, best known as Maroon 5's frontman, expressing surprise about the country star's punk attitude and sense of humor.

Watch Blake Shelton and His 'The Voice' Co-Stars Perform Gnarls Barkley's 'Crazy'