If the whole world were watching, Niall Horan and Shawn Mendes would still make surprise appearances at each other’s concerts. Mendes recently kicked off the On the Road Again Tour, his first time back on the road since cutting the Wonder tour short in 2022 to prioritize his mental health. The singer-songwriter celebrated his latest London stop with special guest Horan, who joined to perform his Flicker single “This Town” at the O2 Arena.

“Everybody, please welcome Mr. Niall Horan to the stage,” Mendes told the crowd. In the video he shared on social media, the audience screamed and sobbed in response. Horan and Mendes both played guitar as they sang together. Before leaving the stage, Horan added, “I love you, and I love this guy. Take care of him.” In March 2024, Mendes appear

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