NBC has picked up a sixth season of its hit summer series "America's Got Talent" from FremantleMedia and Simon Cowell's SYCO Television. Celebrity Judges Piers Morgan, Sharon Osbourne and Howie Mandel will return to the hit series along with host Nick Cannon. The announcement was made Tuesday by Paul Telegdy, Executive Vice President, Alternative Programming and Production, NBC and Universal Media Studios. "'AGT' continues to be a ratings sensation and has hit it out of the ballpark creatively this season," said Telegdy. "We have a dream team of celebrity judges -- Sharon Osbourne, Howie Mandel and Piers Morgan -- and coupled with our versatile host Nick Cannon, we're looking forward to an even bigger summer next year." This is the fifth consecutive year that "AGT" has ranked as the #1 summer series in total viewers. Season-to-date, the show has averaged a 3.4 rating, 10 share in adults 18-49 and 11.8 million viewers ove...