The Insider.com

Justin Bieber's string of holiday songs seem to have no end as the pop star linked up with Mariah Carey for the Christmas classic, All I Want For Christmas Is You.

• November 08, 2011Justin Bieber Premieres New Christmas Music Video
• October 28, 2011Justin Bieber is Seductive on Christmas Album
• October 24, 2011Justin Bieber, Usher Release Their Christmas Duet
• October 19, 2011Justin Bieber Gets a Kiss Under the 'Mistletoe'
• November 08, 2011Mariah Carey reveals post baby bod
• December 01, 2011Lady Gaga Marry The Night Live performance at Grammy

Mariah and the Biebs combine to make an impressive duo (if I say so myself) as the two frolic with hordes of shoppers in a Macy's store while crooning about what they really want on December 25 (looks like the Biebs wants a Nintendo 3DS!). Also as a side note, Mariah looked pretty good in her Santa getup, indicating that she did a good job of losing that baby weight in time for the video shoot and the holidays. Not bad Mimi, not bad.

Check out their Yuletide cheer in the video!