Fans leave tributes at a memorial for Liam Payne in London after he died in Buenos Aires. Despite success with One Direction, Payne struggled with addiction and the pressures of his post-band fame. Photo: Getty Images
AJ McLean had reason to be concerned about Liam Payne. Since production wrapped on the new Netflix music competition series where they had met earlier this year, the Backstreet Boys veteran and One Direction star had talked almost every day on WhatsApp – at least until Payne’s sudden two-week silence early last month
