Madonna's cover of American Pie. It is just plain wrong.

A bad version no doubt, but I love to play it in the following medley:

Weird Al - The Saga Begins
Madonna - American Pie
Bob Rivers - Madonna Killed American Pie

(all of which are the same tune)

Followed by the original...

It always cheers us up on a crap day in the office.

A couple of links for people who haven't come across those two particularly odd versions of American Pie:

http://yeahx3.ionichost.com/?Bobrivers.html
http://www.sagabegins.com/