Singer/songwriter Warren Zevon died on Sunday after a battle with lung cancer. Zevon's first album surfaced in 1969 but it wasn't until his hit, "Werewolves of London," from 1978's Excitable Boy that he gained a considerable amount of attention. Although Zevon never had any hit singles as memorable as that, he made and worked with a number of friends throughout the music industry, including George Clinton, Bonnie Raitt, Jackson Browne, Bruce Springsteen, Jerry Garcia, and members of REM, Fleetwood Mac, David Letterman's Late Show band, and the Eagles. Zevon learned of his cancer in September of 2002 and was given two months to live. He set out to make his final record, which was finally released in August of this year. He was 56.