Next month, Gordon Lightfoot's "Sundown" celebrates the 45th anniversary of its single release. The tune marked the first Hot 100 No. 1 hit for the Canadian folk, folk-rock, and country singer-songwriter. On March 1, Real Gone Music will anthologize this period of Lightfoot's career with the release of the 2-CD The Complete Singles 1970-1980. Gordon Lightfoot began his recording career in Canada, releasing his first singles in 1962. He signed with United Artists in 1965 and released his