Justin Bieber singing from behind the scenes of his single 'Mistletoe.'

'All I Want For Christmas Is You' is a classic song that does not fail to be included in any Christmas list each year. And to make everything grander, you get to hear this version sang in a remix style by Justin Bieber and Mariah Carey.

This duet is included in Bieber's album entitled 'Under the Mistletoe.' The song of course comes with the same old classic lyrics. You will hear Mariah singing the first part with the pop heartthrob coming in for the second verse. The 'Bieber' style of music was never absent. It was always there.

"We wanted Mariah from the beginning, but we kind of thought it was really hard, so we didn't really push the idea," Bieber told MTV News in the idea of getting the diva to agree on working for his Christmas album. But for one condition: Mariah wanted to sing the version with still having to run it on her key. But Bieber was still able to nail it even if the pop star admits it was truly difficult.

"I was very honoured. I really wanted to do the song and I couldn't do it better than her," Bieber added. He also shared that it was Mariah's idea to do the remix version of the song.

This Christmas album of Bieber was released last November 1 with 'Mistletoe' as his carrier single.

Listen to it here:

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