Justin Bieber Confirms Mariah Carey Christmas Collabo

'I think a lot of you are already surprised by this and you're going to be even more surprised when you hear it,' Carey says in video message.

After much speculation, Justin Bieber confirmed that the Queen of the Christmas song, Mariah Carey, will appear on his holiday album, Under the Mistletoe.

And to make it even more special, the pair re-recorded her classic track "All I Want for Christmas" for the album. In the lead-up to the announcement of the collabo, Bieber kept his Twitter followers guessing about who the special guest for the album — which is already filled with a number of big names — might be.

"Oh yeah ...didn't 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??" he teased his loyal followers. "Who is the living legend that I got on the album???? #UnderTheMistletoe #Nov1st."

After his followers offered their guesses, Bieber offered this hint: "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." Before the big reveal, he tweeted out a link to a video message from the singer, then added, "Well like I said ... #UnderTheMistletoe is not your normal christmas album. right @mariahcarey. #NOV1st."

In the video message, while being her usual over-the-top diva self, Carey said, "I'm very excited about it. I think a lot of you are already surprised by this and you're going to be even more surprised when you hear it."

A full track list for Bieber's Under the Mistletoe also hit the Net. The album will include "Only Thing I Ever Get for Christmas," the first single, "Mistletoe," "The Christmas Song (Chestnuts Roasting on an Open Fire)" featuring Usher, "Santa Claus Is Coming to Town," "Fa La La" featuring Boyz II Men, "Christmas Love," "All I Want for Christmas Is You" with Mariah Carey, "Little Drummer Boy" featuring Busta Rhymes, "All I Want Is You," "Christmas Eve" and "Home This Christmas" featuring the Band Perry.

The deluxe edition will include an a cappella version of "Fa La La," as well as "Silent Night," "Pray" and "Someday at Christmas."

Tricky Stewart, who produced the album, shared with MTV News the one song he felt needed to make it on the record. "For me, I knew I wanted 'Santa Claus Is Coming to Town,' " he said. "That's one of those that makes everyone feel good. So we did it and I think it's a really cool version of it."

The first single from Under the Mistletoe, "Mistletoe," drops October 18, with the album due November 1.