Marshall Crenshaw on Playing Buddy Holly and John Lennon.

Rock musician Marshall Crenshaw. According to The New York Times, many critics have ranked Crenshaw"among the finest rock artists of the last dozen years." Now he has written a book. It's a reference guide to Rock 'n' Roll in the movies ("Hollywood Rock" HarperPerennial). According to his longtime bass player Graham Maby, Crenshaw has an encyclopedic knowledge of rock music. And he knows about the rock and roll movie genre from first-hand experience. He played Buddy Holly in the 1987 movie "La Bamba" about musician Ritchie Valens.

Hackford produced the Ritchie Valens biopic La Bamba. He recently produced and directed Everybody's All American, about the life a college football hero. Hackford joins Fresh Air to talk about his early successes and failures, and the role songs play in his films.

Lou Diamond Philips had his breakout role in the film La Bamba. Now he gets to stretch his acting chops as a knife-wielding, peyote-eating cowboy in Young Guns. He says he chooses his roles carefully to avoid being typecast as an "ethnic" actor.