Question: who sang blue moon in american werewolf in london
Answer: Bobby Vinton 's slow and soothing version of `` Blue Moon '' plays during the opening credits , Van Morrison 's `` Moondance '' as David and Alex make love for the first time , Creedence Clearwater Revival 's `` Bad Moon Rising '' as David nears the moment of changing to the werewolf , a soft , bittersweet ballad version of `` Blue Moon '' by Sam Cooke during the agonizing wolf transformation and the Marcels ' doo - wop version of `` Blue Moon '' over the end credits .