Justin Bieber, Mariah Carey record Christmas jingle

Mariah Carey is re-recording her song All I Want For Christmas with Justin Bieber. Photo / Supplied

Mariah Carey has been unveiled as a special secret guest on Justin Bieber's Christmas album.

The Baby singer has worked with high-profile stars on a selection of duets for the festive record - including Busta Rhymes, Boyz II Men, Usher and The Band Perry - but had kept the identity of the superstar from everyone, even his producer Tricky Stewart, until he made the announcement after a series of tantalising tweets.

He wrote: "oh yeah...didnt I promise everyone I would tell them who my last special guest is on my Christmas album #UnderTheMistletoe ??? #nov1st

"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???

"who is the living legend that I got on the album???? #UnderTheMistletoe #Nov1st

"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

"hmmmm....u really wanna know huh....maybe it is time i tell you. #UnderTheMistletoe #Nov1st (sic)".

Justin then tweeted a link to a video of Maria with the words "well like I said ... #UnderTheMistletoe is not your normal christmas album. right @mariahcarey . #NOV1st (sic)"

In the video, Mariah said: "The song sounds great and I'm very excited for you all to hear it this Christmas and be totally festive with our festive collaboration."

Check it out below:

- BANG! Showbiz