One of the most popular TV shows ever produced, I Love Lucy starred Lucille Ball as zany redhead Lucy Ricardo and Desi Arnaz as her husband, Cuban bandleader Ricky. Lucy and her reluctant neighbor and best friend, Ethel Mertz, were always involved in one harebrained scheme or another during this classic's six-year run. The show's theme song, written by Harold Adamson and Eliot Daniel, is most recognizable in its instrumental version, but the song does have lyrics. During a 1953 episode in which Lucy believes everyone has forgotten her birthday, Ricky croons "I love Lucy, and she loves me. We're as happy as two can be. . . ."