Quarterfinal #4 (Live Show) S21E21 - Quarterfinal #4 (Live Show) 2012
12 of the top 48 acts perform for the judges.
- Released: 2012-07-24
- Runtime: 50 minutes
- Genre:
- Stars: Nick Cannon, Howie Mandel, Sharon Osbourne, Howard Stern
- Director:
12 of the top 48 acts perform for the judges.