Episode 521

The twenty-first episode of Season 5, and the ninety-fourth ever episode of America's Got Talent, aired on August 10, 2010. It was the fifth Quarterfinals performance episode and took place in Hollywood.

Jackie Evancho, 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.