I first found this video last year on the website of one of my favorite bands on the planet, Relient K. It's a bit painful to listen to, but SO funny to watch! The way the creatures (and even trees) react to the reindeer's horrible singing never fails to make me laugh out loud! Another fave part is when he struggles for the high note about 3 minutes in! I guess the song is an actual demo tape that someone sent to a record label, trying to get signed. Somehow, another band I love, Emery, got ahold of it and gave it to Relient K, who then animated this video.
Seriously, don't turn it up too loud if you're at work right now or your co-workers will hate you. However, if you are home alone.....crank it up and enjoy every last horrific note!