Rihanna is joining 'The Voice' next season as an advisor
She will join Gwen Stefani, Pharrell Williams and coaches Adam Levine and Blake Shelton starting September 21 when "The Voice" returns for its ninth season.
"This is one of music's true supervisors coming on board to influence the lives and careers of the performers," Greenblatt said of Rihanna during a TCA press tour.