Justin Bieber Talks About "Grinding It Out" With Mariah Carey

Justin Bieber is furthering his already-massive success with the new Christmas album Under the Mistletoe, and he's dishing on working with Mariah Carey!

On re-recording Mimi's "All I Want For Christmas" for the new album, Bieber tells Billboard:

"Yes, that was high. But I grinded it out and we got it down.”

The 17-year-old singing sensation added:

“I remember growing up not having a lot, especially around Christmastime. We had to get stuff from the food bank, so one of the charities we’re helping out is the food bank in my town. I want every one of my fans to feel like they’re helping out the world in some way. And being the one to influence them to do that, that’s something positive I can do with what God’s given me.”

Way to make Santa Claus proud, Biebs!