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Usher has said he and Justin Bieber's new festive duet 'The Christmas Song (Chestnuts Roasting on an Open Fire)' is one for the ages.
The pair's new version of the track is included on Justin's forthcoming Christmas album, 'Under The Mistletoe'.
"Justin and I did the classic record 'Chestnuts Roasting on an Open Fire'," Usher told Ryan Seacrest. "This record is going to be remembered for years to come.
"It's a record that has always been one of my favourites, and I'm happy that I was able to share it with Justin, and for us to put it out. The album is full of surprises. Justin's 'Under The Mistletoe' is going to be incredible!"
'Under The Mistletoe' is released on 31st October and also includes collaborations with Mariah Carey and Boyz II Men.
Watch Usher and Justin recording the song below.