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23 November 2011, 17:32
The teen star hooks up with his mentor for a rendition of Christmas classic in New York.
Justin Bieber was joined by Usher for a special Christmas performance on The Today Show.
The pair sang their festive collaboration 'The Christmas Song (Chestnuts Roasting On An Open Fire)' on the US TV show today (23rd November) – and you can watch a video below on Capital FM.
The track features on Justin's new Christmas album, 'Under The Mistletoe'.
The 17-year-old also sang the album tracks 'Never Say Never' and recent single 'Mistletoe' during his appearance on the show.
"I really wanted to make a Christmas album mainly for my fans and definitely for the holiday season," he said.
"I wanted to be able to give back to people in need. We launched the Believe charity drive which has more than 50 charities worldwide."
In a message on Twitter after his performance, Justin thanked fans who had camped out for days for watch his live set in New York.
Watch Justin Bieber and Usher perform on The Today Show below.