The choir consists of 30 members from Burbank, California. They were all high school students at that time.
Powerhouse submitted its audition onto YouTube. The audition consisted of singing "Firework." Its audition was strong enough for the judges to send it to the Quarterfinals along with eleven other YouTube Acts.
Powerhouse's Quarterfinals performance in Episode 621 consisted of once again singing "Firework." Howie Mandel buzzed the act. The act did not receive enough votes to finish in at least fifth place in America's Vote, eliminating it from the competition in Episode 622 instead of Gymkana.
- Powerhouse is one of the two acts of Season 6 to receive a buzz from a judge other than Piers Morgan in the live shows. The other act is Charles Peachock.
- Powerhouse was the first choir to perform in the live shows in the history of the show as well as the first and only choir to date to be buzzed in the live shows.