By Olivia Wheeler Holly Willoughby was quick to apologise on Sunday’s show after Dancing On Ice fans were convinced she accidentally swore after a Stephen Mulhern prank backfired. During the latest episode, which was Movie Week, Holly, 42, said: “Right, our next couple are taking on one of cinema’s spookiest characters, Beetlejuice, hoping to give their opponents the fright of their lives!” To which co-host Stephen, 46, decided to scream in Holly’s face, which left the presenter jumping as she appeared to drop a swear word. Later on the show, Holly addressed the moment, saying: “Now a little b…