The Ugandan dance troupe earned a standing ovation from all four judges -- Bruno Tonioli, Amanda Holden, Simon Cowell and Alesha Dixon.
Triplets Ghetto Kids were the winners of the Britain's Got Talent semi-final, heading directly to the grand finale that will be held on Sunday, June 4.
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Alesha and Simon picked the Ghetto Kids as their standout act in the Britain's Got Talent semi-final.
Taking to Instagram, the Kids announced the qualification for the finale and thanked those who made it possible to proceed to the next phase.
"We are at the FINALS 🙏🇬🇧❤️ God is Great!" they posted.
"Thank you @bgt this is huge for us, for Uganda and for Africa! Thank you our British fans for Voting!
"To the amazing Team, Our Choreographers @namataesther , @nandalamathew @chamuka_africaug & @rickydux_idu thank you!
"Our Family @reema80, @ronnievybz_tfug @angelaymoore @marionjay17 @kavuma_tfug @bakundachishala thank you all."
In their first performance, the aired on April 15, Bruno Tonioli, a new judge on the show, pressed his gold buzzer mid-performance as the Kids showcased magical dance moves to Mi Gente by J Balvin and WIlly William.
"I've to do it now," Tonioli, an Italian choreographer, ballroom and Latin dancer, and television personality, said before pressing the buzzer.
The golden buzzer is pressed by a judge or host when they decide they want a particular audition to go straight through to the live shows.
It is usually pressed after the performance.
"We've never had that before," Simon Cowell, the creator of the Got Talent franchise, who was also on the judging panel, said.
Tonioli chimed in: "I got it wrong!"
Cowell went on: "That's never actually happened... Normally the golden buzzer is pressed afterwards... He gave you the golden buzzer and you performed with the confetti, it was magical."
The manager of the Triplets Ghetto Kids dance group Dauda Kavuma a.k.a Teacher Teacher said they were in London for the first time.
Britain's Got Talent airs on ITV1 and ITVX.