Whenever a major pop group or boy band breaks up, you can always rely on one of them to become 'experimental' as they look to forge a solo career for themselves. In the case of One Direction, that member was Harry Styles.
Styles has been known for having this mane of hair for such a long time now that it's hard to remember that he was once a much more demure-looking young boy. Not everyone loves the style, but you'd certainly always recognize him in a crowd.