In addition to his acting career, Hamilton is a singer and songwriter. He fronted the Los Angeles-based rock band Fine. In 1999 the group released their debut and only album to date, "Against the View". In June 2003, Hamilton released a single entitled "Wimmin'" which reached #27 in the UK Singles Chart. The song was co-written by British singer Robbie Williams, who also provided some of the vocals on the track. Hamilton co-wrote Williams' 2003 single "Come Undone". Hamilton also claims that he co-wrote Williams' single "She's Madonna" in 2006, but that Williams omitted his name from publishing.