Just when you thought we’d reached peak ’90s nostalgia with claw clips and plastic headbands, Bella Hadid went ahead and brought back another one of the decade’s greatest hair heroes: the zig-zag part. Hadid hit a Bulgari event in Rome on Thursday in a slicked-back low bun and a severe zig-zag part, the likes of which you probably haven’t seen since middle school, care of hairstylist Jennifer Yepez.