THE MUSIC:
is based on the very well known Pachelbel's Canon, written in the 1600's by a guy named Johann Pachelbel.
http://en.wikipedia.org/wiki/Pachelbel
There are loads of versions, mostly classical. The rock version was arranged by Jerry Chang:
http://en.wikipedia.org/wiki/Canon_Ro...
http://video.google.com/videoplay?doc...
But Funtwo's did the best known cover version:
http://www.youtube.com/watch?v=QjA5fa...
A big thanks to Arripay for finding all the links

If you still have a problem finding the song, write your congressman. I'm sure he'd be glad to help.