The Bieber Christmas jams just keep rolling out. We’ll have another for you later today. Bieber joins Mariah Carey on a remix to “All I Want For Christmas Is You,” a song that will appear his upcoming Christmas album “Under The Misteloe.” Mariah Carey had a classic version of this song that released when Bieber was just an infant. Bieber and Carey form a duet on the song, staying true to the original. Check it out below. Get on the hype.