The Irishman wrote on his Instagram on Friday after Payne, who died from a hotel balcony fall in Buenos Aires Wednesday night, had attended Horan's concert in South America just two weeks ago.

Niall Horan has mourned One Direction bandmate Liam Payne in a heartfelt social media post, writing: "It just doesn't feel real."

Niall Horan shared a loving tribute to One Direction bandmate Liam Payne on Friday after Payne tragically died after falling from a hotel room in Argentina on Wednesday. “I’m absolutely devastated about the passing of my amazing friend, Liam,” Horan wrote in an Instagram post. “It just doesn’t feel real.”