Justin Bieber Confirms Christmas Duet With Mariah Carey

Justin Bieber has revealed that he has collaborated with Mariah Carey on his new Christmas album.

The singer, who is set to release 'Under The Mistletoe' on November 1, announced to fans that the pair have recorded a duet of Carey's Christmas number one 'All I Want For Christmas Is You'.

Bieber tols fans over Twitter: "I mean we know we got my big bro @UsherRaymondIV and @thebandperry and @BusaBusss and @BoyzIIMen on the album..but who is the last guest???"

He added: "Who is the living legend that I got on the album???? I mean the fact that I might be singing with one of the greatest voices ever one of the greatest songs of christmas ever...... #NOV1st"

Justin Bieber then posted a video of Mariah Carey discussing the collaboration, in which she says:  "I am here today to tell you a little secret, Justin and I are doing a duet together. It is my song All I Want For Christmas Is You, which I wrote and produced and I'm very excited about it, really excited."

"I think a lot of you are very surprised by this, and you're gonna be even more surprised when you hear it. The song sounds great and I'm very excited for everybody to hear it this Christmas and to be totally festive with our festive collabo."

'Under The Mistletoe' always features a track with Boyz II Men.