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 Top 10 acts perform in Hollywood in their quest to win a sought-after position in the final four. Enrique Iglesias performs "I Like It."

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.

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.

Performance showcases are featured in the eighth audition installment.

Performance showcases are featured in the ninth audition installment.

Performance showcases are featured in the 10th and final audition installment.

The judges travel to Miami for the first time in AGT audition history, in hopes of finding the next million-dollar act.

The judges continue their search for the next million dollar act.

The judges continue their coast-to-coast search for the next big thing.

The judges continue their coast-to-coast search for the next big thing.

Auditions are now being held in New York City. Will the judges like what they see?

In the second "Vegas Verdicts" installment, the judges debate the fates of the hopeful contestants to determine the Top 40 acts.

Ten of the Top 40 acts showcase their talents in the first performance edition.

Four wild-card acts advance to the semifinal round. Country songstress LeAnn Rimes and illusionist Criss Angel perform.