Before they were coaches on The Voice, Christina Aguilera, Blake Shelton, Cee Lo Green and Adam Levine were struggling vocalists just like those they mentor on the NBC hit.
From Shelton's 2005 appearance at the CMT Awards (nice 'do, Blake!) to Aguilera hobnobbing with The Voice host Carson Daly back in the day on MTV's Total Request Live, check out the photo gallery of the gang before they were on The Voice.
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