One thing that gets my ire up (channeling my inner Ed Anger here) is the mischaracterization of Jingle Bells as a Christmas song. Of course, the song has nothing to do with Christmas, but a little peek into history reveals a much richer backstory than I had ever expected.
Without further ado, here's a link to a story which exposes the drag-racing, rock and/or rolling origins of the song. After reading it, I suddenly realized why most renditions of the song only include the first verse.
Heh, just wait until my post about the possible origins of Santa Claus "iconography".