Niall Horan brings out Shawn Mendes for a surprise duet on the London Show

Niall Horan gave his fans a special treat when it came out Shawn Mendes as a surprise guest at his recent concert in London.

On Friday, March 1, Horan’s stop The show: live on tour at the OVO Arena in Wembley, Mendes, 25, came on stage to sing a duet. The pair performed an acoustic version of Mendes’ hit single “Treat You Better.”

Both singers sat on stools and strummed their guitars as they sang the lyrics. The crowd enthusiastically held up their phone flashlights as they were serenaded.

After the duo finished signing, Mendes left the stage. Horan, 30, proudly declared: “That’s my boy!” per footage shared via X.

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Fans went into an uproar on social media after clips of the duet surfaced.

“I’m crying because Shawn Mendes is back on stage and he’s singing ‘Treat You Better’ with Niall Horan,” one user wrote via Xwhile another shared: “The way I scream and cry watching all these videos of Shawn singing on stage with Niall.”

This is the first time in almost a year since Mendes took the stage. He last performed in June 2023 during Ed Sheeran‘s Toronto stops in his Multiplication tour.

Mendes himself has not toured since 2022 Miracle: the world tour. He kicked off the performances in late June 2022, but after several shows he decided to postpone the tour for three weeks so he could focus on his mental health.

“After a few years off the road I felt like I was ready to get back into it, but that decision was premature and unfortunately the toll of the road and the pressure caught up with me and I I have reached a breaking point,” he wrote in July 2023 via his Instagram Story. “After speaking with my team and healthcare professionals, the first thing I need to do is take some time to heal and take care of myself and my mental health. As soon as there are more updates, I promise I will let you know I love you.”

Nearly three weeks later, Mendes ultimately canceled the entire tour.

“I started this tour excited to finally be able to play live again after a long hiatus due to the pandemic, but the reality is that I was not at all ready for how difficult touring would be after this period of absence,” the musician wrote via Instagram the time. “After speaking more with my team and working with an incredible group of health professionals, it has become clearer that I need to take the time I never personally took to ground myself and come back stronger.”

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After taking a year to focus on his health, Mendes said he felt “extreme anxiety” during his creative process to get his music right. However, if he trusted his instincts, the fear would diminish.

“At first it felt so hard to make myself sing without needing perfection, but after a while I started to fall in love with the dance between the ‘right’ and the ‘wrong’ notes,” he said in a video of January. “I realized that there were only moments of bliss and euphoria at the ‘right’ notes, BECAUSE of the ‘wrong’ notes. The only reason I can sing in key is because I learned to listen.”