If you are doing a formal research paper, you should start with an introduction to the band, than go talk about a brief (very brief because i believe there are 5 boys in this band) synopsis about their early lives before they came together, how they came together, what made them a success, what they are currently doing (charities, concerts, humanitarian events, etc.) and finish off with why you believe that One Direction is the success it is today. (e.g. models to teenage girls and stuff.) Then finish with a conclusion of the band.