Really really badly sung "O Holy Night". The singer doesn't have any idea how bad he is. Spectacular and funny!
music from the end of Charlie the Unicorn 2 (thanks FilmCow)
The best I've seen so far of the ubiquitous flash mp3 players. Released under CC-by-SA and some other license.
Walken reads the fantastic Poe poem "The Raven", accompanied by unnecessary musical influences.
Video game music. Lots and lots of it.
best story song I've heard in ages. See also: http://www.3dweb.no/galleri/stuestolbm/bilder/anim1.swf
Hi, my name is Joshua, and I'm addicted to internet radio.