Season 4 of America's Got Talent premiered on June 23, 2009, and concluded on September 16, 2009. Nick Cannon hosted, and Piers Morgan, Sharon Osbourne, and David Hasselhoff were judges. The season's winner was Kevin Skinner.
Episodes
Main article: Season 4 Episodes
Acts
Main article: Season 4 Acts
Auditions
Main article: Season 4 Auditions
Vegas Round
Main article: Season 4 Vegas Round
Quarterfinals
Main article: Season 4 Quarterfinals
Semifinals
Main article: Season 4 Semifinals
Finals
Main article: Season 4 Finals