heloo, i want to know what is the title and singer of the song in back to the future 1 when m.j.fox play it at his parents prom nite. both songs. thanks

He plays:

Earth Angel - Marvin Berry
Johnny B. Goode - Chuck Berry

All the singing by the character Marty McFly is actually performed by Mark Campbell, and the guitar solo is performed by Tim May, so although the song is written by Chuck Berry, he doesn't perform the version in the movie.

And all the singing by the character Marvin Berry is actually performed by Harry Waters Jr.

I don't know why they credit the songs to Marty McFly and Marvin Berry, when they are obviously fictitious!