This is the moment a young girl collapsed on stage during a Katy Perry gig - after being invited to take part in one of her songs. The incident occurred around 10.20pm at Little Caesar's Arena in Detroit, US, when Perry invited three fans to join her on stage to play maracas during one of her songs.

A young fan fainted on stage during Katy Perry’s concert in Detroit — moments after being chosen from the back row. The girl, who looked overwhelmed and nervous, had joined Perry on stage to play maracas when she suddenly collapsed.

Katy Perry immediately switched into protective mode when a fan collapsed during the singer’s “Lifetimes Tour.”