Again I assume this is meaning any Christmas song. And that honor goes to Paul McCartney's "Simply Having A Wonderful Christmas Time" - seriously the most annoying and stupid song I could think of. I LOVE Christmas music, and was worried I wouldn't be able to find one for this prompt, and then this song came on a commercial and I said "BINGO". It's just so dumb, uncreative... and the "music video" is just... yeah.
Ugh.