Louis, Liam, Niall, Zayn and Harry all auditioned as individuals on the seventh series of The X Factor but the boyband pop Gods (Nicole Scherzinger) decided to fuse them together to create One Direction.
Their debut single, 'What Makes You Beautiful', sold over 150,000 copies in its first week on sale, which is slightly bonkers.
Their debut album includes a song written by Kelly Clarkson called 'Tell Me A Lie'. Pleasingly, it sounds exactly how you want One Direction singing a Kelly Clarkson song to sound.
One Direction went to America to support Big Time Rush on their tour but everyone liked One Direction better and then this happened.
The Direction are the first British band to have a debut album enter the Billboard 200 album chart at Number One, making them bigger than Take That, The Beatles and even The Spice Girls.
In 2012 they released their second album 'Take Me Home', which was quite successful really.