Carol of the Bells! So many great versions, just a fantastic piece of music.
Rather odd for an atheist, but I love this one
http://www.youtube.com/watch?v=RNYAGnqLgnA
I always cry, but this is just about the best
http://www.youtube.com/watch?v=5g4lY8Y3eoo
Charlie Brown, I also watched that one, and I couldn't even watch the Flying Nun!! I have the movie and the album, that's good stuff. I particularly enjoy Linus' speech.