Marvin Berry and the Starlighters
Marvin (Harry Waters Jr.), the guitarist, cuts his hand getting time-traveling Marty McFly (Michael J. Fox) out of the trunk of a car and can't play, so Marty has to fill in for him. Marty plays a few numbers straight, then plays "Johnny B. Goode," a song that hasn't been written yet. Excited, Marvin immediately phones his cousin Chuck Berry so he can hear this "new sound," thus insinuating that Marty was responsible for the invention of rock 'n' roll.
The Starlighters were played by Tommy Thomas, Granville 'Danny' Young, David Harold Brown, and Lloyd L. Tolbert. The soundtrack album features them singing "Night Train" and The Penguins' "Earth Angel," as well the Marty McFly version of "Johnny B. Goode."
See also The Pinheads.