US singer Mandy Moore will play a feisty homewrecker in a forthcoming appearance on long-running cartoon sitcom The Simpsons. The CANDY hitmaker stars in an episode entitled HOMER AND MARGE TURN A COUPLE PLAY and wreaks havoc when her character, FIONA, persuades animated hero HOMER to give her a neck massage - breaking the heart of longsuffering wife MARGE. The show airs in America on 21 May (06), reports MTV.