Just weeks after appearing on NBC’s America’s Got Talent, a member of competing act Los Osos High School has died. Emily Gold was just 17 years old when she was found dead on September 13. Los Osos High School dance troupe climbed the America’s Got Talent ranks during season 19. The group of 15 to 18-year-olds made it to the first round of semi-finals before being eliminated. Now, the Rancho Cucamonga, California students are mourning the loss of one of their beloved members and friends. Emily Gold dies at 17Los Osos High School dancer and America’s Got Talent season 19 alum Emily Gold has tra…