London: The former One Direction singer Niall Horan surprised his fans as he joined the stage with Hollywood sensation Taylor Swift during her performance in Wembley Stadium, London.
Horan treated his fans with a performance of his song 'Slow Dance,' reported Entertainment Weekly.
The 24-year-old Irish singer followed appearances by Selena Gomez, Shawn Mendes, and Troye Sivan, who all popped in for performances along the way on the Reputation tour.
After the appearance, Swift shared a behind-the-scenes photo of their 'soundcheck at Wembley Stadium' to social media.
She wrote, "THANK YOU for surprising the crowd tonight!!!."