Judges Howard Stern, Heidi Klum, Melanie Brown and Howie Mandel will bring Season 8 of America’s Got Talent to an end on September 18, NBC announced today. The Nick Cannon-hosted competition series will wrap up its current cycle crowning a winner in a two-hour live show from NYC’s Radio City Music Hall. Down this year but still a dominating presence on NBC’s schedule, AGT is produced by Syco Television and FremantleMedia North America with Simon Cowell, Jason Raff, Sam Donnelly, Trish Kinane and Rob Wade the executive producers. The network also announced that reality show American Ninja Warrior and freshman faux reality series Siberia will end their seasons with one-hour episodes September 16.