Gwen Stefani will rejoin 'The Voice' in season 12

Whilst Miley will sit next season out, she will return for season 13.

Paul Telegdy, President of the Alternative and Reality Group at NBC Entertainment, said: "We can’t wait to experience the unique chemistry and energy Gwen, Alicia, Blake and Adam will bring to season 12.

"With Miley returning for season 13, we’re truly ecstatic about the unmatched musical know-how and talent coming together in our coming seasons."

The group of mentors on 'The Voice' are really close, something which Adam never expected to happen.

He said: "We all started as singers and musicians, it's a sense of community now, it was like, 'Wow we know each other' when before it was all about music and now we are all friends.

"Everyone is always so busy that you don't get to make friends with your peers. With 'The Voice' I now have these lifelong friends that I communicate with and talk to. I wouldn't have thought I would have been friends with Shakira or Usher, it's crazy."

Meanwhile, things are going from strength to strength for Gwen and Blake and she previously admitted she "can't believe" she's dating Blake.

She said: "I'm our biggest fan. I actually feel like I'm not in my own life, because I'm not. I'm in a different life all of a sudden. I'm so blessed and I feel like I believe in my path. Now there's all these miracles around me!

"Trust me, I still can't believe that happened and is still happening. For whatever reason, I was chosen to be in this position, and I'm so honored and more confident. And I look at it, like, it always works out."