Season 4 - Episode Guide

Hosted by Nick Cannon and presided over by the explosive combination of celebrity judges David Hasselhoff, Sharon Osbourne and Piers Morgan, America's Got Talent brings the variety format back to the forefront of American culture by showcasing performers from across the country. The series is a true celebration of the American spirit featuring a colorful array of hopeful stars, including singers, dancers, comedians, contortionists, impressionists, jugglers, magicians and ventriloquists, all vying for their chance to strut and perform on stage hoping to win America's hearts -- and the million dollar prize. The two-hour fourth season premiere kicks off with auditions shot on-location in theaters across the nation.

Auditions shot on-location in theaters across the nation continue -- Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million dollar prize and become the most talented act in America.

Auditions shot on-location in theaters across the nation continue -- Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million dollar prize and become the most talented act in America.

Auditions shot on-location in theaters across the nation continue -- Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million dollar prize and become the most talented act in America.

Auditions shot on-location in theaters across the nation continue -- Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million dollar prize and become the most talented act in America.

Contestants who made it through the first round of auditions descend upon "The Entertainment Capital of the World." As the acts dream of being the next Vegas headliners, the celebrity judges, David Hasselhoff, Piers Morgan and Sharon Osbourne set out to deliberate, debate and determine which of the acts will make it into the elite Top 40. After being unable to reach some decisions, they agree to issue a challenge to some of the contestants in an attempt to break the judging deadlock. Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million-dollar prize and become the most talented act in America.

In the "City of Lights" celebrity judges David Hasselhoff, Piers Morgan and Sharon Osbourne interrogate some of the acts to help them determine who will make it into the Top 40 and onto the live performance shows. It's a revealing look into the deliberations as the judges fight it out to determine the fate of the contestants. For the acts its an emotional day that either ends with heartbreak and anguish or joy and celebration. One contestant faces what he calls one of the "most difficult decisions of his life." Nick Cannon hosts this variety competition series which features a colorful array of hopeful future stars as they compete for a chance to win a one million dollar prize and become the most talented act in America.

Ten of the Top 40 contestants perform live for a chance to win a one million dollar prize and become the most talented person in America. Judging is turned over to the American viewing audience.

The votes are in and five acts from the previous night move on to make up the top 20. Those acts will continue their pursuit of the million-dollar prize and will be one step closer to becoming the most talented person in America. International superstar Mariah Carey also performs.

Ten of the top 40 contestants perform live for a chance to win a one million dollar prize and become the most talented person in America. Judging is turned over to the American viewing audience.

The votes are in and five more acts from the previous night move on to make up the top 20. Those acts will continue their pursuit of the million dollar prize and will be one step closer to becoming the most talented person in America.

The third group of ten from the top 40 contestants perform live for a chance to win a one million dollar prize and become the most talented person in America. Judging is turned over to the American viewing audience.

The votes are in and five more acts from the previous night move on to make up the top 20. Those acts will continue their pursuit of the million dollar prize and will be one step closer to becoming the most talented person in America.

The final group of ten from the top 40 contestants perform live for a chance to win a one million dollar prize and become the most talented person in America. Judging is turned over to the American viewing audience.

The votes are in and five more acts from the previous night move on to make up the top 20. Those acts will continue their pursuit of the million dollar prize and will be one step closer to becoming the most talented person in America.

The first 10 acts from the top 20 perform live for a chance to win a one million dollar prize and become the most talented person in America. The American viewing audience votes for who will move into the finals.

The votes are in and four acts from the previous night move on to the finals for a chance at the million dollar prize and becoming the most talented person in America.

The next 10 acts from the top 20 perform live for a chance to win a one million dollar prize and become the most talented person in America. The American viewing audience votes for who will move into the finals.

The votes are in and four more acts from the previous night move on to the finals for a chance at the million dollar prize and becoming the most talented person in America.

The eight finalists perform live one last time for a chance at the million dollar prize and the title of the most talented person in America. The American viewing audience votes to pick the winner.

The votes are in and Nick Cannon reveals live the winner of this year's "America's Got Talent." Surprise guests will also give special live performances. The winner takes home the million-dollar prize and the title of the most talented person in America.