'America's Got Talent': What's Happening In The New Season?

Mel B tells Billy Bush and Kit Hoover how much she loves being a judge on "America's Got Talent." Also, Howard Stern talks about why this year is "tougher than ever" on the NBC reality series. Plus, what does Howard think of new judges, Heidi Klum and Mel B? Lastly, Heidi and Mel B discuss the toughest part of judging.