Demi Lovato confirmed that she is ending her stint with 'X Factor' to concentrate on her concert tour and music. The show's creator, Simon Cowell, is not surprised by the move and in fact he already has a replacement in mind, Miley Cyrus!

How would you like a tongue-wagging, twerking Miley Cyrus as mentor?

And why would Cowell consider Miley to be the next judge?

"She's got a big mouth!" Cowell told E! Online, although the entertainment news site quoted a source as saying that "There haven't been any conversations about judges next year."

According to the interview with Hollywood Life, Demi Lovato said that she plans to give January 2014 for herself after she ends her 'X Factor' stint as mentor of the girls.

"It is so important to me [to take time off]. I think we might do a few things here and there that I've committed to already or that I'm passionate about. When I work so much, I don't get a lot of sleep and I think I really want to get really fit and in shape and just get really healthy. I want to be rested mentally and spiritually - I think it's a month to re-charge and I would love to have more than that but I've decided to go on tour as well!" Lovato told Hollywood Life.

Don't get too attached to Lovato's blue hair since's she's already thinking about changing it to "blonder or darker or whatever."

As for Cowell, he said that he wasn't at all taken aback by the exit of Demi Lovato from 'X Factor' because he already knew beforehand that the 21-year-old singer has a scheduled tour next year. But he said he's not closing any doors should Lovato decide to come back.

"People leave and they come back, we're used to that on our show. So the door's open," said Cowell.