Episode 623

The twenty-first episode of Season 6, and the one hundred and thirtieth ever episode of America's Got Talent, aired on August 16, 2011. It was the fifth Quarterfinals performance episode and took place in Hollywood.

Matt Wilhelm, who won a spot in the Quarterfinals by receiving the most votes in a poll on YouTube, and 11 other YouTube acts selected by the judges competed. The 12 acts performed for 4 spots in the Semifinals.