The fourth season of America's Got Talent, an American television reality show talent competition, premiered on the NBC network on June 23, 2009. Country singer Kevin Skinner was named the winner on September 16, 2009. This season is the first season to be broadcast in high definition. This season's host was Nick Cannon, who replaced Jerry Springer. Springer had said that he could not host due to other commitments. All Season 3 judges returned for the fourth season, despite rumors that Sharon Osbourne would be leaving the show. Season 4 was David Hasselhoff's final season as a judge. This season started broadcasting live on August 4, 2009.

Season 4 Episode 19 - 4th Ten of Top 40 Perform (live)

The Top 40 acts have been narrowed to 10 and are featured in the fourth performance show. Air Date : 25th-Aug-2009

Season 4 Episode 1 - Audition Show #1 New York, Chicago, Seattle

The talent show's fourth season opens with preliminary auditions taped in theaters across the country. Nick Cannon is the new host, replacing Jerry Springer. David Hasselhoff, Sharon Osbourne and Piers Morgan return as the judges. Air Date : 23rd-Jun-2009  Read More

Season 4 Episode 2 - Audition Show #2 Seattle(2), Miami

The judges travel to Miami for the first time in AGT audition history, in hopes of finding the next million-dollar act. Air Date : 24th-Jun-2009  Read More

Season 4 Episode 3 - Audition Show #3 New York(2), Chicago(2)

The coast-to-coast auditions continue as the judges search for the next million-dollar act. Air Date : 30th-Jun-2009  Read More

Season 4 Episode 4 - Audition Show #4 Houston, Miami(2)

The judges continue their search for the next million dollar act. Air Date : 1st-Jul-2009  Read More

Season 4 Episode 5 - Audition Show #5 Los Angeles

The judges continue their coast-to-coast search for the next big thing. Air Date : 7th-Jul-2009  Read More

Season 4 Episode 6 - Audition Show #6 Houston(2)

The judges continue their coast-to-coast search for the next big thing. Air Date : 8th-Jul-2009  Read More

Season 4 Episode 7 - Audition Show #7 New York(3)

Auditions are now being held in New York City. Will the judges like what they see? Air Date : 14th-Jul-2009  Read More

Season 4 Episode 8 - Audition Show #8 Seattle(3)

Performance showcases are featured in the eighth audition installment. Air Date : 15th-Jul-2009  Read More

Season 4 Episode 9 - MySpace.com audition show

Performance showcases are featured in the ninth audition installment. Air Date : 21st-Jul-2009  Read More

Season 4 Episode 10 - Final audition show

Performance showcases are featured in the 10th and final audition installment. Air Date : 22nd-Jul-2009  Read More

Season 4 Episode 11 - Vegas Verdicts (1)

In the first "Vegas Verdicts" edition, winning acts from the preliminary auditions advance to Las Vegas in the hope of securing a coveted position in the Top 40, with the judges debating their show-biz fate. Air Date : 28th-Jul-2009  Read More

Season 4 Episode 12 - Vegas Verdicts (2)

In the second "Vegas Verdicts" installment, the judges debate the fates of the hopeful contestants to determine the Top 40 acts. Air Date : 29th-Jul-2009  Read More

Season 4 Episode 13 - Live Performances (1)

Ten of the Top 40 acts showcase their talents in the first performance edition. Air Date : 4th-Aug-2009  Read More

Season 4 Episode 14 - Results (1)

The first five winning acts are selected for the Top 20 in a results edition. Mariah Carey performs, as does ventriloquist and Season 2 winner Terry Fator. Air Date : 5th-Aug-2009  Read More

Season 4 Episode 15 - Live Performances (2)

Ten acts from the Top 40 take to the stage in the second performance installment. Air Date : 11th-Aug-2009  Read More

Season 4 Episode 16 - Results (2)

Five winning acts are selected to the coveted Top 20 in a results edition. Electro hip-hop duo LMFAO and comic illusionists Penn and Teller perform. Air Date : 12th-Aug-2009  Read More

Season 4 Episode 17 - Live Performances (3)

The third performance episode showcases 10 acts from the Top 40. Air Date : 18th-Aug-2009  Read More

Season 4 Episode 18 - Results (3)

Five acts win a slot in the sought-after Top 20 in a results show. Daughtry and Ashley Tisdale perform. Air Date : 19th-Aug-2009  Read More

Season 4 Episode 19 - 4th Ten of Top 40 Perform (live)

The Top 40 acts have been narrowed to 10 and are featured in the fourth performance show. Air Date : 25th-Aug-2009  Read More

Season 4 Episode 20 - 4th Results Show: Final 5 move on to Top 20 (live)

Five final acts win a position in the Top 20 in a results show. Air Date : 26th-Aug-2009  Read More

Season 4 Episode 21 - Semifinals, Group 1

The semifinals kick off with the first 10 acts from the Top 20 taking the stage. Air Date : 1st-Sep-2009  Read More

Season 4 Episode 22 - Semifinals, Group 1 Results

Four acts are selected to advance to the finals in a results edition. David Hasselhoff performs, as do the Muppets' Kermit the Frog and Miss Piggy. Air Date : 2nd-Sep-2009  Read More

Season 4 Episode 23 - Semifinals, Group 2

Ten semifinal acts from the Top 20 perform. Air Date : 8th-Sep-2009  Read More

Season 4 Episode 24 - Semifinals, Group 2 Results

A results edition reveals five winning acts. Members of the stage show "Jersey Boys"---a musical depicting the life of the pop group Frankie Valli and the Four Seasons---perform a medley of tunes from the show. Air Date : 9th-Sep-2009  Read More

Season 4 Episode 25 - Final Performances

The final performance episode features the 10 finalists in showcases. Air Date : 14th-Sep-2009  Read More

Season 4 Episode 26 - Final Results

The winning act is revealed in the Season 4 finale. The victor scores $1 million. Performers include "Britain's Got Talent" phenom Susan Boyle; pop songstress Shakira; English singer Leona Lewis; country's Rascal Flatts; and Cirque du Soleil. Air Date : 16th-Sep-2009  Read More