Michael J. Fox recently played the guitar for Johnny B. Goode at his annual A Funny Thing Happened on the Way to Cure Parkinson’s fundraiser this year! Man, if this doesn’t bring a grin to your face, you have a cold, cold heart, my friend. And hey, as a bonus, he doesn’t try to make us believe that’s his voice singing it! I mean, I love Back to the Future, but even as a kid it was pretty obvious that wasn’t Marty McFly singing.