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Christina Aguilera, Adam Levine, Cee Lo Green and Blake Shelton performed Gnarles Barkley's Crazy last night on the debut installment of the new NBC talent show The Voice.

Afterward, the four coaches took to their high-tech chairs and turned their backs on contestants as the "blind audition" got underway.

Unlike American Idol and other vocal competition shows, these judges don't see the contestants until after they perform -- making their critiques and decision about the VOICE and not about the LOOK. But will the gimmick play well with audiences? That remains to be seen ...