Did you spot this ‘mistake’ during Britain's Got Talent semi-final one?

It all proved to be too much for the judge who was taken by surprise and shouted “F**k!” before covering her mouth.

Eagle-eyed Britain's Got Talent viewers noticed what they believed to be a ‘mistake’ during last night’s semi-final show.

Elizabeth’s creepy performance of The Haunting saw her bring judge Amanda Holden ‘face-to-face’ with the ghost of mysterious Agatha and her 11-year-old daughter.