Little Big Town will serve as battle round mentors for Blake Shelton 's team on the upcoming season of NBC's The Voice . The band made the announcement by posting a photo with Blake on their Instagram account.
Stevie Nicks will mentor Adam Levine 's team, and rocker Gavin Rosdale will help out his wife Gwen Stefani 's group. The mentor for new coach Pharrell Williams hasn't been announced yet.
Season seven of The Voice premieres September 22 on NBC.
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