Voice Cancelling Program - MP3 Audio

Does anybody know of an audio program that will take the voice out of a song, to leave it with the instrumental part? I used to have a version of Sony's Sonicstage that could do it, but the new one doesn't have that feature anymore. Any and all help appreciated, list free or pay programs.

Ummm....one of my friends has a program that does that. I'll ask her what it is.

I have always been interested in finding something like this too. But I never have found ANYTHING that did even an okay job. It always messed up the music too.