CRAZY horses couldn't keep them apart - an audience at Jimmy Osmond's Blackpool summer show could barely believe their eyes when the American star's brother, Donny, took to the stage.

Donny joined his brother at Saturday night's performance of Boogie Nights The Musical at the Grand Theatre.

And fellow performers were just as shocked. Dancer Jackie Lemmens fainted on seeing Donny's arrival and had to be carried off the stage by technicians.

She said: "I had just been talking to the other girls in the break that it would be fantastic to see both Jimmy and Donny appear together and there he was, I felt really light-headed and just crashed to the floor!"

And Jimmy's co-star, Billy Pearce, added: "I was waiting in the wings and he just appeared, Jimmy hadn't mentioned him coming at all, it was a complete shock. I'm not even sure Jimmy knew."

And no-one was more surprised than Jimmy who said: "I have had a wonderful welcome by the lovely people of Blackpool and told all my brothers to come and visit. Donny was in the middle of his tour and just thought as he had a night off he'd come up to Blackpool. I must admit it was a wonderful surprise to see him on stage as it's been a long time."

The two performed their 70s hit, Crazy Horses, before Donny settled down to enjoy the rest of the performance with his family.