Blake Shelton along with the other judge/coaches from the new reality competition show - The Voice (Adam Levine, Christian Aguliera and Cee Lo Green) perform 'Crazy'.

The Voice - is set to premiere April 26th on NBC and each of the 'Voice' coach will pick singers to mentor during blind auditions.

Blake and his fellow coaches will only be able to hear the competitors and not see them. The coach then forms his/her own team to compete for the rest of the show, with viewers casting votes on the final winner.

The whole premise of the show is that it should be the voice that makes the singing superstar, and not his or her looks.

Check out the ad for the show's concept and premiere.