Bieber's new Christmas song Mistletoe premiered on Ryan Seacrest's KIIS-FM radio show today.
Speaking about the song, which is the first single from his forthcoming holiday album, Under The Mistletoe, the 17-year-old told host Ryan: 'I wanted to make a Christmas album, because my fans haven't heard my music in a long time. I wanted to do something that was charitable, but was also something that people haven't heard before. Because there are a lot of Christmas songs on my album that are new and original that people haven't heard.'
The Canadian singer went on to announce that he'll perform alongside Gaga, 25, at the New Year's Eve event, which will be hosted by Seacrest this year.