Britain’s Got Talent judge Amanda Holden says the show is unlikely to turn up another Susan Boyle for a decade.

Susan’s showstopping audition became a YouTube sensation last year and she has gone down a storm in the United States, gathering a string of celebrity fans.

Amanda, 39, told Good Housekeeping magazine how Susan changed the nature of the contest.

“Last year’s series became iconic – you’re not going to find another Susan Boyle in 10 years,” she said.

“We had no way of predicting that she would turn into a global phenomenon.

“But it has changed the nature of the show, as now, potentially, we are looking for a worldwide star.

“I just have to go on my gut instinct, thinking: ‘What do I like? And what would my mum and nan like?'”

Amanda also spoke of her hopes of having another child.

Talking about her four-year-old daughter Lexi, she said: “I’m just like any other working mother in the country – dealing with the same mix of guilt and worry.

“I don’t really want Lexi to be an only child, but at my age I think I’m very lucky to have one healthy one.”