ET's with Simon Cowell and David Hasselhoff to get the updates on the new season of "America's Got Talent."

When "America's Got Talent" launches its second season premiere tonight at 9 p.m. on NBC, there are some really weird acts, including a woman named BUSTY HART, who likes to break things (watermelons, bricks) with her breasts, and a 7-foot-2-inch man who simultaneously drinks milk through his nose while explosives are strapped to his stomach. But there are also some talented people: an 84-year-old who the judges say sings better than FRANK SINATRA and a four-year-old girl who those same judges compare to a young SHIRLEY TEMPLE.

"What I like about watching the show is there's an unpredictability about it," says creator/executive producer SIMON COWELL. "Everyone who comes on the stage genuinely believes that their act is what's going to take them to Vegas and make them multimillionaires -- every one of them."

The audition process for the talent competition is tougher this season, according to Cowell, because in addition to the three official judges -- DAVID HASSELHOFF, PIERS MORGAN and SHARON OSBOURNE -- the audience gets a say. This feature was incorporated from the British version of the show.

"The audiences on these shows are brutal," the "American Idol" judge continues. "So, whereas on 'Idol' we would let someone sing for five or 10 seconds, on this show, if [the audience] doesn't like someone, they're after blood. So, it's a raw experience you are going to see this time."

But someone who is truly talented can turn the audience around. "Sometimes the audience, in the very beginning, will hate the person and go, 'Boo, boo, boo,' and by the end, they were standing on their feet and cheering that person, you know," Hasselhoff adds. "And then all of a sudden we ... will sometimes change our opinion and put them through."