August 28, 2013 1:50 pm America's Got Talent Preview 08/28 The semi-final round kicked off last night on America’s Got Talent. Some performers rose to the occasion while others felt the wrath of Howard Stern. US & World Videos 4:12 Keeping Up with Rock Legends on Tune Talk 3:41 Tune Talk: An Update about Madonna and More 8:28 Papa Keith Talks Hip Hop and Adam Duritz Discusses Upcoming Counting Crows Tour 4:13 The Pop Stars Making Waves This June 1:57 Gifts for Dad on Father's Day