Directioners mourning singer Liam Payne leave tributes in London and other cities The Associated PressWhat To Know About Liam Payne’s Death: Zayn Malik Postpones Shows, Cowell And Cole React ForbesFans Mourn Liam Payne at London Memorial Rolling StoneLiam Payne's girlfriend Kate Cassidy breaks silence on singer's death: 'At a complete loss' USA TODAYLiam Payne fans gather in great crowds to pay tribute in London’s Hyde Park CNN