Last year, Mendes made a surprise appearance to perform “Treat You Better” during Horan’s headlining show in London
Shawn Mendes and Niall Horan Reunite to Perform ‘This Town’
Aug 18, 2025 | 9:23 AM
Last year, Mendes made a surprise appearance to perform “Treat You Better” during Horan’s headlining show in London