Listen to Half Moon (Dick Cavett Show, August 3, 1970) [Live] online. Half Moon (Dick Cavett Show, August 3, 1970) [Live] is an English language song and is sung by Janis Joplin. Half Moon (Dick Cavett Show, August 3, 1970) [Live], from the album The Original US TV Show Appearances 1969, 1970 (Remastered, Live On Broadcasting), was released in the year 2016. The duration of the song is 4:00. Download English songs online from JioSaavn.