Question: Who sang blue moon in american werewolf in london?
Disambiguated questions and answers: question: Who played the the song "Blue Moon" in the end credits of American Werewolf?
Who played the the song "Blue Moon" in the opening titles of American Werewolf?
Who played the the song "Blue Moon" during the transformation scene in American Werewolf?
answer: The Marcels
Bobby Vinton
Sam Cooke
Natural Questions answer: Sam Cooke
the Marcels (from the Wikipedia article "An American Werewolf in London")