The first of four semifinal rounds is featured. Two acts will move on to the finals---one chosen by celebrity judges David Hasselhoff, Brandy and Piers Morgan; the other by viewers. Regis Philbin hosts.

Two more finalist spots are up for grabs as performers compete in the third of four semifinal rounds. Brandy, David Hasselhoff and Piers Morgan are the judges. Regis Philbin hosts.

The fourth and final semifinal round. David Hasselhoff, Brandy and Piers Morgan serve as judges. Regis Philbin hosts.

A wild-card competition features 10 deserving but overlooked acts from the semifinals competing for two additional spots in next week's $1 million finale. Among the performers getting a second chance are: Nathan Burton; Leonid the Magnificent; All That; Natasha Le; Corina Brouder; Jessica Sanchez; Bobby Badfingers; N'Versity; Quick Change; and Alexis Jordan. Regis Philbin hosts.

Season 1 of the talent show concludes with host Regis Philbin announcing which one of the 10 finalists viewers chose to win the $1 million prize. Judges Piers Morgan, Brandy and David Hasselhoff offer their opinions on the top act. Blue Man Group and singing duo Aly and AJ perform.

The winning act is revealed in the Season 5 finale, which features performances by an array of Las Vegas and Hollywood stars.

Acts compete for a position in the Top 48. From Las Vegas.

The top 6 acts perform for the judges.

Five acts advance to the finals, rounding out the top 10; Little Mix performs; acrobatic gymnasts AcroArmy perform.

The contestants from the top 10 acts compete for the last time, and hope to win the competition and the $1 million prize; a special performance from Flo Rida and The Rockettes.

Exciting surprises and highlights of the final performances; the Season 10 winner is revealed; performances by special guests include Rachel Platten, Penn & Teller, Yolanda Adams and the Harlem Gospel Choir, Terry Fator, Freelusion and Mat Franco.

Before the Live Shows begin, relive the best moments from the season so far, including the Judges Golden Buzzer saves.

Ten of the most memorable acts from around the globe perform for the judges. Four of these acts will advance - two chosen by a panel of superfans, one Judges' Choice and one who will receive a Golden Buzzer to perform in the finale.

The competition continues as 10 more of the most talented, memorable and all-around fan favorite acts perform for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Four acts will advance, including one who will receive a Golden Buzzer.

Ten more of the most talented acts perform for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Four acts will advance, including one who will receive a Golden Buzzer to perform in the finale.

A final group, including 10 of the competition's most talented acts, performs for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Four acts will advance, including one who will receive a Golden Buzzer to perform in the finale.

Twelve finalists perform for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Six of these renowned acts will move on to the finals, five will be voted through by a panel of Superfans and one will be the Judges’ Choice.

The Top 10 finalists perform, including four Golden Buzzer acts and six performers from the Semifinals, for judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. America’s Superfans vote to determine who will be named the ultimate Champion.

In the finale, the ultimate Champion is crowned in front of judges Simon Cowell, Heidi Klum, Alesha Dixon and Howie Mandel. Special guests take the stage with the finalists for memorable performances.

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The second of four semifinal rounds finds acts vying for two more finalist spots to be determined by viewers and judges Brandy, David Hasselhoff and Piers Morgan. Regis Philbin is the host.

The auditions continue as people showcase their talents in hopes of making it to the Las Vegas callbacks and one step closer to winning the million dollar grand prize and the contract in Vegas.

The auditions continue as people showcase their talents in hopes of making it to the Las Vegas callbacks and one step closer to winning the million dollar grand prize and the contract in Vegas.

The auditions continue as people who auditioned online on MySpace showcase their talents in hopes of making it to the Las Vegas callbacks and one step closer to winning the million dollar grand prize and the contract in Vegas

Terry Crews recaps the road to the finale and the 11 acts up for the $1 million prize.