Justin Bieber's 'All I Want For Christmas' Duet With Mariah Carey Leaks And Something Sounds ... Familiar

This morning when we arrived in the MTV Newsroom, we were alerted to the most important holiday-related news of the year: Justin Bieber and Mariah Carey's duet of "All I Want For Christmas Is You" leaked online.
Listening to the hotly anticipated track, we were struck by ? well, by the fact that Mariah's vocal seems [...]

Source: http://newsroom.mtv.com/2011/10/28/justin-bieber-all-i-want-for-christmas-is-you-leak-mariah-carey-same-vocal/

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