Amanda Holden was pulled on stage to take part in the mystery routine. Throughout the act a number of unexplainable things occurred including a balloon burst on its own and a floating stick of chalk write out the word keys on a blackboard.But what really terrified viewers was the fact that stand-up comic David Walliam's real house keys had been taken without him noticing and used in the act. For more of the latest showbiz and TV news from the Daily Star, make sure you sign up to one of our newsletters here. This is a live TV story and is being constantly updated.
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