If there's a Karaoke version of it, I suggest you just buy that as it'll likely be better quality.
If not. Download Audacity (open source audio editing software)
Here's one way to do it.
http://audacity.sourceforge.net/help/fa ... ove-vocals
There's also a few karaoke plug-ins that will do this for you as well. Here are some examples
http://mp3.about.com/od/essentialsoftwa ... movers.htm
Good luck.
If not. Download Audacity (open source audio editing software)
Here's one way to do it.
http://audacity.sourceforge.net/help/fa ... ove-vocals
There's also a few karaoke plug-ins that will do this for you as well. Here are some examples
http://mp3.about.com/od/essentialsoftwa ... movers.htm
Good luck.