All I Want For Christmas Is You by Mariah Carey vs. Welcome To The Black Parade by My Chemical Romance.
Did you expect anything different from this channel.
EDIT 11/29/16: I'm honestly completely overwhelmed by the response to this mashup. Thank you so so so much!
EDIT: 11/20/18. I know about MCR's cover. We all do. Save the comment about it please lol
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