The Darkness were left embarrassed after daring a fan to go topless, only to discover "she" was a man.

The group's bass player Frankie Poullain encouraged a slim, long-haired fan at a festival to flash him.

He was shocked when the fan revealed a flat hairy chest reports the Daily Star.

He said: "I've got very bad eyesight, I should wear glasses.

"I was looking across at a long-haired skinny figure, who looked quite elegant, sitting on somebody's shoulders and I gestured they should reveal their breasts. They did and I realised it was a guy.

"I probably should have learnt a lesson then. Look before you leap. No, look before you leer."