Mariah Carey and Justin Bieber
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Unlikely Pop Star Team-Ups: 23 Music Collaborations We NEVER Thought We'd See
18. Mariah Carey and Justin Bieber
When Justin announced he was releasing a Christmas album in 2012 his Beliebers were soon crying out for a cover of 'All I Want For Christmas' to be included on the tracklisting. Well... they got their wish when Mariah herself ended up featuring on the track!! Justin couldn't believe his luck!