Who Covered Carey's 'Christmas' Best?

While never an underperformer, it's safe to say that Mariah Carey's All I Want For Christmas Is You became infinitely more popular following it's rousing inclusion in 2003's Love Actually.
Since Olivia Olson smashed the song in Richard Curtis' new holiday classic, it's been covered everywhere from Glee to the Today show -- even Mariah herself has re-released a version she recorded with Justin Bieber.
But which cover is king? Take a listen to all the options below and then weigh in on which version of All I Want For Christmas Is You is the biggest gift of all!
Mariah Carey's 1994 Original
Shania Twain's 1998 Cover
Olivia Olson's Cover From Love Actually
Miley Cyrus' 2007 Cover
John Mayer's 2008 Cover
Amber Riley's 2011 Glee Cover
Mariah Carey & Justin Bieber's 2011 Deut
Mariah Carey's 2012 Late Night Acoustic Cover
Carly Rose Sonenclar's 2012 X Factor Cover
Demi Lovato's 2012 Christmas in Washington Cover