Piers Morgan has revealed that Susan Boyle was incredibly nervous about her appearance on America’s Got Talent last month.

Morgan told The Mail On Sunday: “Susan, despite what some people seem to think, is a very funny, quick-witted lady. But like a lot of performers, she gets incredibly nervous before big performances. And she was today.

“‘It’s a bit daunting,’ she admitted, ‘thinking of so many people watching me sing here for the first time’.'Barbra Streisand apparently throws up before every show,’ I reassured her.”

He continued: “Later her nerves worsened, so Sharon Osbourne went up and calmed her down brilliantly. ‘What did you say?’ I asked.

“[Sharon told me], ‘I just looked her in the eye and said – Susan, you’re a winner, not a loser, and you’re a fighter like me, so get out there and show them all what you can do!’”

Morgan concluded: “In the end, none of us needed to worry about Susan Boyle. From the moment the studio lights dimmed and she walked out to the microphone, the place erupted.

“And her rendition of the Rolling Stones’ ‘Wild Horses’ was so technically perfect, and so hauntingly beautiful, that it gave me the chills.”

Piers Morgan has said that Americans will go all out to beat Susan Boyle’s Britain’s Got Talent performance in their own American version of the show.

Morgan told The Futon Critic: “The British show got record ratings up 50% because of the Susan Boyle phenomenon. And I have got no doubt that we are going to see significant increases in the ratings of America’s Got Talent this summer.

“I think Americans are very competitive, particularly when it comes to the Brits, and I think that America’s going to want to tune in to see how America responds to the challenge, you know? Have you got anyone who can beat our Susan?”

He added: “Do I think there’s a Susan Boyle act in there that could have the same kind of effect on the world? Yeah, I think there’s two or three that, you know, depending on how they go down with the American public, could be really, really big acts.

“So I’m very excited and again the Susan Boyle phenomenon has pulled through into the American show.”

Jerry Springer has stepped down as host of America’s Got Talent.

Springer says he won’t be on the show when it returns later this year and in a statement yesterday, he revealed he’s leaving the show because of other commitments. These include his talk show and a stage role.

Springer called his job on America’s Got Talent “an amazing ride.” His replacement for the upcoming fourth season wasn’t announced Thursday.