Shawn Mendes had a very special treat up his sleeve for fans at his O2 Arena show in London on Saturday night (Aug. 16). The singer brought out his old pal former One Direction member Niall Horan for a run through the latter’s debut solo single, 2016’s “This Town.”

In his first stage appearance since the death of his former bandmate Liam Payne in October 2024, Horan was greeted with ear-piercing screams by the fans in the arena, as evidenced by a video of the special moment posted by Mendes. “Everybody please welcome Mr. Niall Horan to the stage,” Mendes said casually as bedlam broke out.

Horan, dressed in jeans and a long-sleeve white shirt made his way to the stage holding an acoustic guitar and gave Mendes a big hug as the duo broke into song together, crooning the ballad’s chorus tog

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