Apparently Chris Martin of Cold Play is a great "Back to the Future" fan, and managed to talk Michael J Fox into playing with Cold Play. Michael's illness prevents his singing, but despite his condition he still can play the guitar well enough to rock out on Johnny B Good.
Have a look at the story here on ABC News and the video at the bottom of the story that features Michael playing on Johnny B Good.
http://www.abc.net.au/news/2016-07-1...ldplay/7640996
