It must officially be the Christmas season, because the Justin Bieber/Mariah Carey 'All I Want for Christmas Is You' collaboration hit the web today, four days before the Bieb's holiday album 'Under the Mistletoe' hits stores.

Wait...is it us, or do Mariah's vocals sound exactly the same as they did in the original song? Something's fishy...

As you probably remember, Carey first scored a hit with 'All I Want for Christmas Is You' in 1994. (How could you forget? It's played ad nauseam every year between Thanksgiving and Christmas.) And now people are noticing that the remade version sound suspiciously like the original. So it's quite possible the song below is actually a duet between Bieber and some tracks that had been laying around the studio for 17 years.  Check out the new version of 'All I Want for Christmas Is You' below and tell us what you think.

[via BuzzFeed]