Formed from rejects from his British TV show X-Factor, Simon Cowell created the group One Direction. Harry Styles, Niall Horan, Zayn Malik, Louis Tomlinson and Liam Payne didn’t know each other before Cowell put them together. They’d never sung together and didn’t know if they would even like each other. That was in 2010. Now, One Direction is the most popular band in the world, selling out every date on their tour in a matter of hours in locations as diverse as their home in the UK to the rest of Europe, America and Asia.