Um, I can think of several things here. The The King's Singers did a version of the Beatles song Blackbird. There is the nursery rhyme Sing a Song of Sixpence. There is a Grimms fairy tale about the Golden blackbird and also all of Aesop's fables that include blackbirds. Think I am saying I don't know.
Avalon and Chesterfield both produced a talented individual, but what did these individuals have in common?
Jesus born on this day is a song by Avalon. Jesus was played by John Hurt in History of the World part I. If this is the right answer, take a bow Google. If not...I'll get my coat.