We already knew that there was a Johnny Cash song in Guitar Hero 5, so it shouldn't have been too big a surprise to see that the man himself will be appearing as a character in the title as well.
Johnny Cash tribute artist Terry Lee Goffee has provided the swagger for Activision's motion-capture team, and as you can see, he's done a pretty good job of it.
Though it all looks a little strange, don't you think? He should be flipping the bird to somebody with a snarl, not singing to a crowd of screaming girls.
On a serious note. That is a really Huge No no. Plagiarism is really, really bad actually.
In fact my one high school english teacher spent a whole semester on how bad it is and how Not to do it.
-mumble- Don't even bother getting an avatar...