"America's Got Talent" returns this summer for its eighth season with the hottest performers from across the country ready to compete for the $1 million prize. For the first time ever, the panel will have four judges as chart-topping former Spice Girl Mel B and supermodel TV host Heidi Klum join returning judges Howard Stern and Howie Mandel. Nick Cannon returns as host. The two-hour premiere features explosive auditions from New York City, Los Angeles and San Antonio as the countdown to the live shows at Radio City Music Hall begins.