La Bamba (1987) is an American biographical film written and directed by Luis Valdez. The picture features Lou Diamond Phillips, Esai Morales, Rosanna DeSoto, among others.[1] The drama is based on the real life events that affected the lives of rock star Ritchie Valens, his half-brother Bob Morales, his girlfriend Donna Ludwig and the rest of their families. (from Wikipedia)
http://en.wikipedia.org/wiki/La_Bamba_(film)