Bella Hadid has championed countless early 2000s beauty trends — wearing everything from thin eyebrows to dark eyeliner — but one of our favourites has to be when she perfectly encapsulated one of today's most polarizing trends: the zig-zag part. This hair part was extremely popular in the early aughts (right next to the side-swept part) so its modern update in combination with an updo just screams "I grew up in the early 2000s."