Episode #4.14

The first 12 quarterfinalists on "America's Got Talent" offered up their best on Tuesday, and Wednesday was the night to see which of them made it to the Top 20. First, a little housekeeping. Judge Piers Morgan doubted on Tuesday night that Acrodunk, the high-flying group of trampoline-jumping slam dunkers, missed their final dunk on Tuesday. He stood by his claim Wednesday before host Nick Cannon went to the replay and proved, without a doubt, that the final dunk was nailed just like all the other before it. Piers apologized. Dunking the competition: To add to the dunking crew's elation, they were the first act to learn they were moving into the Top 20. Acrodunk came to the stage alongside BreakSk8, the roller-skating dance group, which was eliminated. Be our guest: Season 2 "Talent" winner Terry Fator, who signed what the show keeps calling a $100 million contract to perform in Las Vegas, popped by to perform a couple of songs with his dummies and thank the show and Simon Cowell for giving him his start. Later, Nick's wife Mariah Carey visited to perform her latest single, "Obsessed." Nick said, "I don't care what anybody says, that song is about me, because I am obsessed with this beautiful girl right here!" Hubby's new broadcast platform continued to push Carey's new album, with Nick even telling viewers to go to nbc.com to buy it. More results: Nick called three more acts to the stage: Lake Houston Dance, Drew Thomas Magic, and yodeler Manuela Horn. Only one of the three acts would make it to the Top 20. Nick announced that the first of the three acts to be eliminated was Lake Houston Dance. That left Manuela Horn and Drew Thomas Magic to vie for the Top 20 spot. The act advancing to the next round was Drew Thomas Magic. Next up were singer Kevin Skinner and a capella group Mosaic. There didn't seem to be much drama at the announcement of the fact that country crooner Kevin Skinner was the next semifinalist. With just two semifinals spots remaining for the final five acts to share, Nick called The Platt Brothers, The Diva League, and Grandma Lee to the stage. Just one of them would land a spot in the Top 20. The Platt Brothers were the first to be eliminated, leaving Grandma Lee and The Diva League. The next semifinalist was Grandma Lee, who teared up a little after her name was called and said, "This means everything to me." The final two acts were 13-year-old dancer Arcadian Broad and 14-year-old singer Thia Megia. The judges were the ones who got to decide between the two acts. Piers said he wasn't quite convinced with Arcadian's performance, and he voted for Thia. Sharon said they were "both fantastic," and she gave her vote to Arcadian. That left the tie-breaker up to David Hasselhoff. He said, "this show is about talent and diversity," but whoever loses can go on and do well. He told Thia she would "go a long way," but his choice was Arcadian.