Few film directors make as effective use of pop music on their soundtracks as Cameron Crowe. In anticipation of the Oct. 14 release of Crowe’s Elizabethtown — which, by many accounts, is Crowe’s iPod as set to film — the director has written an essay for the Los Angeles Times about the art of picking the right song to match a scene. He cites some of his favorite examples by other directors, and he offers anecdotes behind such memorable moments in his own films, revealing how he got a reluctant Peter Gabriel to OK ”In Your Eyes” for the Say Anything… boombox serenade, or how real rockers reacted to the ”Tiny Dancer” singalong in Almost Famous. It’s long but worth reading.