Huey Lewis, the lead singer of Huey Lewis And The News makes a brief appearance in the first Back To The Future film as a high school teacher who is listening to band auditions. He quickly nixes Marty's band by complaining that they are just too loud.

In Back To The Future III, the band ZZ Top makes their cameo playing a band at the festival. Their gig is halted by a confrontation between Marty, Doc and Buford, the baddie of this film. But things soon get swinging again. I think this is one of the rare photos of the two bearded dudes without their trademark sunglasses.

And then there's Flea. Specifically, the bassist for the Red Hot Chili Peppers appears in both Back To The Future II and III as Needles, a friend of Marty McFly's. Although, with a friend like Needles, Marty doesn't need any enemies.