Every #1 Billboard song --

[selbmarsh2000]

http://www.ubu.com/sound/keesing.html

This is really cool. The first clip takes about 45 to complete and ends at 1983.

The second one is shorter.

[selbmarsh2000]

http://joemygod.blogspot.com/2011/02/five-seconds-of-every-1-pop-single.html

This link works better.