An ARIA is a type of song that originated in Italy and is usually a solo vocal piece with an elaborate accompaniment. A SWAN song is a metaphor for a final gesture, effort, or performance given just before death or retirement. A BALLAD is a type of song that tells a story, often of folk lore or legend. A LULLABY is a type of song that is used to soothe or comfort a child. A ROUND is a type of song that is sung by two or more voices in which each voice sings the same melody but starts at different times. A THEME song is a type of song that is associated with a particular event, person, or television show.