America's Got Talent: The semi-finals heat up with a show-stopping performance from Luke Islam

Pint-sized singer Luke Islam, 12, wowed the audience of America's Got Talent with a rendition of Never Enough from The Greatest Showman on Wednesday's semifinals episode. He even gave gave Simon a high five Miss tricks: But a few tricks were hit or miss, as the dog struggled to run under Lukas' body, jump on his back, or traverse the judges table—and it exposed the difficulties of sustaining such an act Loved the mistakes: 'I actually hate you right now, Howie,' Simon retorted, saying he 'loved the mistakes' Swedish singer Chris Klafford charmed viewers with an original tune about finding and losing great love, which he said was inspired by his grandparents' lengthy relationship. Original song: Swedish singer Chris Klafford charmed viewers with an original tune about finding and losing great love, which he said was inspired by his grandparents' lengthy relationship Mixed reaction: Howie didn't love the song, but Julianne called Chris' writing 'authentic and true,' giving her fellow judge a vigorous thumbs-down for his assessment Already produced: Queen Latifah praised his skill, too: 'I'm already at the concert, and I hear a whole audience like me singing that hook. High hopes: The Detroit Youth Choir got an even bigger reaction with their version of Panic at the Disco's 2018 hit High Hopes—and it was clear from the start that the judges loved it, too Bullies: They said he'd saved them from bullies, made them feel beautiful, and taught them it was okay to show emotion, with one child adding: 'You just brought the best out of me' Their synchronized dance and original rapping had everyone on their feet clapping along. Tribute: Light artist Alex Dowis then created an ever-changing blacklight painting about first responders to a crisis, inspired by the events of September 11, 2001 Big praise: 'It's amazing what you're able to do with imagery emitting such emotion,' offered Howie, praising Alex's use of light to depict a 'dark time,' though he couldn't always follow it Remarkable: Simon, however, called it 'remarkable,' urging everyone to rewatch it later Rule-breaking guitarist Marcin Patrzalek kept things moving with a softer instrumental tune that he'd done before, featuring a half-plucked, half-drummed piece backed by a band.