You might be able to get access to the stems since it was released for Rock Band, good luck hunting for that.
Some people have luck removing the "center channel" of a mix, but you get mixed results with that, and often you're left with a really odd mix missing sections. Don't ask me how to do that either.
My advice. Suck it up and deal with it. If you're not going to listen to it the way the artist intended, take a pass.