BEVERLY HILLS, Calif. (AP) -- Rihanna is headed to "The Voice."

GLENDALE, AZ - JANUARY 31: Singer Rihanna performs onstage during DirecTV Super Saturday Night on January 31, 2015 in Arizona. (Photo by Christopher Polk/Getty Images for DirecTV)

NBC Entertainment Chairman Bob Greenblatt announced Thursday that the singer will serve as a key adviser to all the coaches on the new season of the singing competition show.

Blake Shelton, Gwen Stefani, Adam Levine and Pharrell will serve as coaches. The network previously announced that country star Brad Paisley would be an adviser to Shelton.

Season nine of "The Voice" begins Sept. 21 at 8 p.m.


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