One Direction is one of the most promising bands in modern music. Niall Horan, Liam Payne, Harry Styles, Zayn Malik, and Louis Tomlinson are a force to be reckoned with. Their international vibrant sound has landed them at the top of the charts. Hits like "What Makes You Beautiful," "Gotta Be You," and "One Thing" become instant fan favorites. In this exclusive documentary we explore the evolution of one of the hottest boy bands in music - One Direction.