Mackenzie Sol walked onto the AGT stage carrying a promise Simon Cowell made to him 21 years ago—and left with the moment that changed his life forever. 💛🎤 After delivering an emotional performance of “back to friends,” fans couldn’t stop talking about his incredible vocal control, with many saying, “The way he switches from chest voice to falsetto is so smooth… he sounds like James Arthur!” 😭

British singer Mackenzie Sol first auditioned for judge Simon Cowell on The X-Factor when he was just 4 years old. At that time, Simon told the aspiring young singer, “In 12 years time, you’re through,” never realizing how prophetic his words would be.

“That moment in that room was when I knew I wanted to be a singer,” Mackenzie told AGT host Terry Crews backstage as they looked at a video of the performance.

Mackenzie Sol on 'America's Got Talent': Watch sombr 'Back to Friends'

Now, Mackenzie is back in front of Simon, as well as his fellow judges Howie Mandel,Sofia Vergara and Mel B for the new season of America’s Got Talent as well as his mum and his whole family in the audience.

“Hopefully, I don’t go out there and make a fool of myself,” said Mackenzie, who admitted to be very nervous at the size of the audience. “I don’t know why it took 21 years. I did a lot of singing back home. I did what I could. It’s just really hard to make it where I come from. It’s  such a small town.”

Mackenzie was hoping Simon would remember him, but it’s quite the stretch because he doesn’t resemble his 4-year-old self. He’s a grown man now.

When Simon asked the 25-year-old singer from Newcastle, England, what he had been doing, he answered, “The last three years, I’ve just been singing in my local clubs and pubs and just doing what I can.”

Who Is Mackenzie Sol? 'AGT' Contestant's 'American Idol' Past and More Facts

He failed to mention that he auditioned for Season 22 (2024) of American Idol and made it all the way to the Top 20 before being eliminated.

But he did take a minute to tell Simon that he auditioned for him when he was four years old on The X-Factor.

Simon went along with it saying, “I swear. I was about to say we’d met. So, what happened?”

To which Mackenzie replied, “I was four years old.” Everyone laughed as Mackenzie added, “It was a great experience. Obviously, I got to meet you and I am here today to do my thing.”

Then it was time for him to sing and he chose to perform  “back to friends” by Sombr, earning a standing ovation from the judges and a Golden Buzzer from Mel B, which is in the below early release video.

Mel B said, “I think you are absolutely, extraordinarily fabulous. I’m glad I got to speak first because I’m going to do this.”  And she hit the Golden Buzzer.