Major shake-up at NBC's hit singing competition as it has been revealed that Miley Cyrus will be joining "The Voice" as a coach for next season. For the women coaches, it has been a revolving door of original coach Christina Aguilera (back this season), Shakira, and Team Blake mentor Gwen Stefani. Cyrus is this season's key adviser, which means that she helps the singers for their final prep before they go to the Playoffs. She has loved this role and announced via social media that she will be taking over a seat for season 11. It is presumed that she will fill Aguilera's chair as she is on and off but there is also another female who will be coming on as a coach: Alicia Keys .