That's counting Bieber's mentor
As Bieber told MTV News during the live stream that followed the premiere of his "Mistletoe" video, the Busta collaboration is one he'll always remember ... mostly because he considers it to be quite brilliant.
"If you really think about it, it's genius, because it's rapping on a Christmas album ... and, like, I'm rapping on it. And then it's singing," he explained. "It's cool. [Busta's] got, like, a percussive voice to him [and] the beat was so crazy. I'm actually playing drums on that song, playing the snare."
And then, of course, there's his collabo with none other than
"Mariah Carey is doing it with me! It's incredible. So excited," he said of "All I Want." "We wanted Mariah from the beginning, but we kind of thought it was really hard, so we didn't really push the idea. But she's on my label, so we reached out to some people, she got in contact with us, and Randy Jackson was actually at the studio with us, and I was like, 'Yo, you think you can help get Mariah on the Christmas album?' And he was like, 'I'm actually going to see her in New York on Monday,' and I was like 'Yo, go do that!' "
Which Bieber Christmas collabo are you most looking forward to? Let us know in the comments!