Most hairstyles come about in a flurry of Instagram hype and celebrity endorsement only to be filed away into the hair archives a few months (or even weeks later). But there is another class of hairstyle. In a league of their own, these hairstyles are so classic, they don't have even a hint of a time span. They manage to look modern and relevant, no matter what year they are worn. From ponytails to low buns, these hair looks are the sort you'll come back to again and again. What exactly are these illustrious hairstyles? Well, we're about to show you. Keep clicking and we'll walk you through the expiration-evading hairstyles that never seem to go out of fashion.