Settle in for a crash course in everything 1D — from their humble beginning as a collection of X Factor UK hopefuls whom Simon Cowell instantly recognized as having the potential to become one of the biggest musical acts in the world to their surprising connection to The Lord of the Rings.
If you were devastated when Zayn Malik left One Direction, you're not the only one. Justin Bieber responded to the singer's decision in the best way ever.