Taylor Swift will appear on the seventh season of The Voice as an adviser (and to remind everyone that she has an album out). NBC is undoubtedly hoping to use her star power as a way to boost the show's flagging ratings: Viewership of the singing competition's last finale was down 25 percent from the prior cycle. Like Coldplay's Chris Martin on the last cycle, Swift will be doling out advice to all of the performers. She'll join judge-specific guest advisers including Stevie Nicks for Adam Levine, Alicia Keys for Pharrell, Little Big Town for Blake Shelton, and Gavin Rossdale, who will be helping out his wife Gwen Stefani. This isn't the first time T. Swizzle has appeared on the show; she made a surprise appearance for Usher's singer Michelle Chamuel when she was rehearsing Swift's song "Trouble." Chairs will spin on September 22.