Piers Morgan, America's Got Talent

Season 4 of America's Got Talent (premiering Tuesday at 9pm/ET on NBC) has a lot to live up to after the British version's Susan Boyle-enhanced record ratings. But judge Piers Morgan has no doubt the American version will thrive as well — perhaps even with Boyle's help.

Morgan says Boyle, who finished second in the British version of the show, might perform for American viewers as well.

"If Susan is up for it health-wise, feels okay and wants to do it, then I'm sure that Simon [Cowell] will seriously consider that," Morgan said. "You know, my gut feeling is that she probably will."

Morgan told TVGuide.com that the variety competition has the "potential to be absolutely huge. All the excitement around the British show...[NBC has] been using that to encourage interest in the American show."

The audition process has already started, and Morgan said the Americans can rival the British competitors.

"There's two or three that could be really, really big acts. There's one [singing] group that are incredibly emotional and there will not be a dry eye in America when they perform."

America's Got Talent's previous winners haven't all been singers—Season 2 ventriloquist Terry Fator signed a five-year deal to perform at the Mirage in Las Vegas. Viewers can expect a variety of standouts this year as well.

"There are some great dance acts, some weird sort of gymnastic acts which are really clever in the way they've executed it, some great magic acts... It's a great range of talent."

The most recent season of Britain's Got Talent made a surprise sensation out of Boyle, whose rendition of "I Dreamed a Dream" has been viewed over 60 million times on YouTube. But her success won't necessarily pave the way for another underdog to sail through the competition.

"Being the underdog is fine, but in the end this show will root out the winner as being the most talented act," Morgan said. "Obviously if the talent comes from an unexpected source, that is more exciting than if they looked the part, if they looked like a star."