So I know you can't beat John Lennon's "Happy Xmas(War Is Over)'" but i adore the Polyphonic Spree and really like their cover.
So just a few Christmas songs, though I couldn't find the one song i went looking for, "the gift of the magi" by Squirrel Nut Zippers. It's so good. Their Christmas CD is great. "Christmas Caravan." I listen to it every year. I just love it. Was a gift from my friend kim, long ago. :-)