AGT: All-Stars Week 4 Introduces An Act That Would Give M3GAN Nightmares

Ten more Got Talent favorites returned to compete on Monday's AGT: All-Stars, which handed the power of the Golden Buzzer to Heidi Klum.

The competition's fourth week of preliminary auditions welcomed back magician Aidan McCann, singer Cristina Rae, dancer Darius Mabda, cello duo Emil & Dariel, water spitters Human Fountains, dance group Mini Droids, the Ndlovu Youth Choir, dance pair Power Duo, singer Robert Finley and horror illusionist Sacred Riana.

But only a lucky pair would get to join the six acts already sent through to the next round — aerialist Aidan Bryant, saxophonist Avery Dixon, acrobatic trio Bello Sisters, Detroit Youth Choir, dance group Light Balance Kids and stand-up comedian Mike E. Winfield.

Read on to see how this week's 10 acts fared, complete with official footage of their auditions. When you're done, vote for the two you would have sent through, then drop a comment with your thoughts on AGT: All-Stars Week 4.

The closest thing we have to a real-life Harry Potter, this Irish wonder from Britain's Got Talent Season 14 took the stage with a superhero-themed routine that left the judges speechless. Well, not entirely speechless. Cowell blessed the newly caped crimefighter with a "Thank God you're here."

Oh, and Heidi Klum blessed him with something even better — her Golden Buzzer!

Back with a vengeance, this AGT Season 15 finalist sang her heart out for the judges, wowing them with a powerful rendition of Lady Gaga's "Hold My Hand." Well, wowing might be an exaggeration. Howie Mandel said it was "good, bordering on great," putting much of the blame on her song choice.

Impressing Cowell was this cello duo's main goal this week, since he wasn't around to enjoy them during AGT Season 9. (It's hard to believe, but this show does, in fact, predate him.) Unfortunately, their rockin' rendition of A-ha's "Take On Me" didn't quite do the trick. And when he asked the cellists for an interesting fact about themselves, all they could think of was that they're... dental students? Mandel put it best: "I smell a career in dentistry!" Sorry, boys.

This week's moment of nonsense came courtesy of Human Fountains, a group of musical spitters that somehow made it to the quarterfinals of AGT Season 13. I'm surprised it took Simon Cowell as long as it did to buzz them out; I would have done it when one guy spit out a hot dog, onto which another guy spit mustard, only for the third guy to eat the whole thing. What even?!

Given that this quick-footed foursome won Belgium's Got Talent, I knew they'd be able to dance. No surprise there. But the '90s megamix? I didn't see that coming, and it turned out to be exactly what my Monday needed. Not only can these boys move, but they have taste. This would have been my Golden Buzzer pick.

This blind veteran from AGT Season 14 brought his signature sound and inspirational energy back to the stage. Klum couldn't decide which she loved more, his voice or his moves. Even Cowell admitted that he wished he had a Platinum Buzzer to give him.

In case M3GAN didn't give you enough nightmares, along came this evil doll who has already scared her way through four different Got Talent shows, even winning Season 2 of Asia's Got Talent. What can I even say about this latest routine? It was cool, it was weird and, most importantly, it's now over.

The winner of Romania's Got Talent Season 12 was admittedly nervous when he took the All-Stars stage, but those nerves quickly gave way to a stunning performance set to Shawn Mendes' "In My Blood."

His nerves got another workout later in the show when he made it to this week's top three. Unfortunately, he didn't quite earn enough votes to win.

The judges were thrilled to welcome back AGT Season 14 finalist Ndlovu Youth Choir, and their high expectations were more than met by the group's powerful original song.

Unfortunately, the judges won't be welcoming them back to the next round of All-Stars. They only earned enough of the superfans' votes to finish in second.

The winners of Philippines' Got Talent Season 5 brought their infectious energy and irresistible charm to the All-Stars stage, where they stole the judges' hearts with an emotional, gravity-defying dance routine set to Calum Scott's "You Are the Reason."

They apparently also stole the superfans' hearts — and their votes — soaring through to the next round.