Powerhouse Choir perform their rendition of Katy Perry’s “Firework”. » Get The America’s Got Talent App: http://bit.ly/AGTApp » Subscribe for More: http://bit.ly/AGTSub » America’s Got Talent Returns Tuesday August 23 8/7c on NBC! » Watch Full Episodes Free: http://bit.ly/AGTFullEpisodes AMERICA’S GOT TALENT ON SOCIAL Like AGT: https://www.facebook.com/nbcagt Follow AGT: https://twitter.com/nbcagt …

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