Here's what judges Piers Morgan, Sharon Osbourne and Howie Mandel said:
The group performs a sports-themed routine, with the girls dressed as cheerleaders while the men wear football uniforms. Piers buzzes 'no' halfway through, however, later saying that they "became a cheerleading act" and thought that the use of a mascot made them look "a bit silly".
Sharon admits that she was "not in love with" the theme and wishes that they had come up with something more sophisticated but loves their energy and technical skill even though she does not believe that this was the right performance to get through to the final. Howie recognises that they were giving a salute to NFL kick-off week, but thought that this was too All-American and not specifically Miami enough.
After an explosive performance of Aerosmith's 'Dream On', Sharon admits that Lys sounded like Cher at first, saying that her lower register is "not very pleasant to hear" as she loses all the melody to her voice. She also questions why Lys chose such a song as it didn't suit her voice.
Howie says that while Lys is an amazing singer, the "big risk" she took tonight made her less relatable as the audience was hearing a voice that they had not previously been exposed to. Piers disagrees, praising her for stepping it up and showing them something different rather than coming out and doing the same thing and saying that she was in "perfect pitch".
Landon Swank - Illusionist
The act sees Landon spit out a live goldfish from what was only a Goldfish cracker and then seemingly push his hands through glass to release the fish. Howie thinks he's a "conjurer" and calls it "really amazing" as he has never seen anything like it. Sharon loves his "relaxed" presentation and finds him to be "so modern".
Piers is dumbfounded and wants to know how he's done it, and Landon admits that it's the first time the trick has ever worked.
Anna Graceman - Singer
She performs a version of Cyndi Lauper's 'True Colours'. Piers thinks that she has an "extraordinary voice" even though she missed a few notes in her lower register, because she is "incredible" when she belts. He admits that he is "torn" because Jackie Evancho had perfect pitch last year, but did not have as big a voice.
Sharon loves the song choice, but thought that the set was a bit difficult to perform on. Howie praises her for being "already a star" at only 11 years old and says that he thinks she is still in the running despite not being as good as last week.
Silhouettes - Dance performance art group
The group gets a standing ovation for a lively performance. Sharon calls it "exquisite", saying that it was simplistic and beautiful and had a great message which they executed perfectly. Howie agrees, saying that they are the first act tonight who should definitely be in the finals.
Piers loves the story that they told as it "makes people proud of being American" despite the hard times the country is currently facing. "That is very much part of this show," he adds, calling it "the best performance tonight by a mile".
Smage Bros Riding Show - BMX daredevils
The dangerous routine makes Howie speechless, causing him to admit that he doesn't know what to say but that the group will definitely make Wisconsin famous.
Piers admits that while it was exciting, he has reservations as the routine is not as good as last time and that he noticed many "disappointing" mistakes. Sharon calls it "amazing" though, admiring their technical skill.
The group performs a lively medley of The Jackson 5's biggest hits including 'I'll Be There', 'I Want You Back' and 'Love You Save', earning them a standing ovation from the audience and judges alike. Piers calls them an "amazing pop group" and praises their organisation.
Sharon agrees, telling lead singer Kalani that she is "loved" and that there is "such a place" for the band in the industry right now as they have it "all going on". Howie says that America is full of "idiots" if they don't immediately start voting for Poplyfe as no other act will appeal to more people.
Piers buzzes "no" partway through their vampire-themed performance. Sharon admits that there are never any surprises when they take the stage despite the fact that they're technically good, saying that they're "too predictable".
Howie agrees, lamenting that they have not stepped it up from past weeks and may not be suited for the finals. Piers says that they should not have done the "horror stuff" tonight in order to show the judges and audience some variation on what they're capable of as it all came off as "a bit boring".
Landau Eugene Murphy Jr - Singer
Landau performs Dean Martin's 'Aint That A Kick In The Head', earning him a standing ovation. Howie loves that he's moved on from Frank Sinatra and urges America to vote for him. He says that Landau is "amazing" as he loves not only his singing but also his persona.
Piers thinks that Landau "got his mojo back" as he was relaxed and smiling and had swagger compared to the nervousness of last week. He also says that he is the definitive act that he would spend money on for a 90-minute performance. Sharon calls him "one hell of a class act", praising the way he is dressed as well as his "beautiful" presentation.
The group earns another standing ovation from the audience and judges, with Piers saying that they are the "icing on the cake" and that it was their best performance ever, as well as one of the best performances of the night full stop. He also admits that he's never seen as much of an "original, creative or dynamic act" in the history of the show.
Sharon feels like she's in Vegas already watching a world famous act, insisting that it's only a matter of time before it comes to pass. Howie agrees, calling them "one of the best acts you can possibly see live".
America's Got Talent continues tomorrow night on NBC.