Katy Perry serenades fan in 'crazy' experience

Mr Hatcher said he had been a fan of the popstar since he was six, and recalls "begging" his mum to play her CDs in the car.

He attended the concert in Sheffield with his friend Mia Lloyd and his mother Sharon, as well as two of her friends.

After being invited on to the stage, Mr Hatcher danced with the Roar and Firework star before Perry sang an off-the-cuff song about Monyash, Bakewell and Derbyshire.

"I'm sure she had no idea where it was but it was crazy that she name dropped the places," he said.

On the experience itself, Mr Hatcher said: "I think I foreshadowed it, me and my friend were screaming the entire time and she did look over a few times.

"We were just vibing and when she was choosing people to come on to the stage we were screaming and our seats were really good, we were directly in her eyesight.

"I was pointing at myself and I couldn't believe it when she picked me, it was so surreal."

Making most of the opportunity, he managed to get a selfie with Perry as a memento.

Mr Hatcher, a student of Chinese and economics at SOAS University of London, said he was recognised by other fans after his appearance on stage.

"There was this one nine-year-old girl in the car who rolled down the window after the show and screamed 'Ben you legend'," he added.

"This has been an all-time high and my small claim to fame. People will get tired of hearing it but I won't get bored of talking about it."