This one is hilarious because it's various Christian artists singing The 12 Days of Christmas (some not very well, I might add). Includes Amy Grant, Michael W. Smith, The Afters, Addison Road, Casting Crowns and many more! Definitely worth watching!
This one is Tenth Avenue North, and these guys are hilarious - they have done a fine job of a video here. You HAVE to watch till the end to see the awesome choreographed dance! I'm serious, you wanna see the dancing.
And, of course, I have to add Relient K's Sleigh Ride video. I just love their version of this song!