LOS ANGELES:- One Direction has reunited at ‘The X Factor’ to support Louis Tomlinson. Harry Styles, Niall Horan and Liam Payne were all backstage with Louis at the show, where he performed his new single ‘Just Hold On’ for the first time, in tribute to his late mother Johannah Deakin, who passed away earlier this week after a secret battle with leukaemia. The group have been on hiatus for almost a year but the trio dropped everything to be with Louis after he decided to go ahead with the performance, which had been planned for some time and which his mother had been looking forward to.