http://timesonline.typepad.com/technology/2009/02/top-20-tracks-r.html
"If you’ve never heard of it, Songsmith is a program that can give an automatic musical accompaniment to any vocal track you give the computer. The basic aim is give the karaoke singer the chance to live out their dreams and become an all-round musician. It launched in America with an astonishing promotional video (see below).
But as a Microsoft spokesman said recently, Songsmith is being "used in ways we haven't quite imagined." People have been taking the vocals from hit songs and then adding Songsmith backing tracks to them. The results are funny, bizarre and sometimes disturbing."
Press play if you dare: