One of Summer's biggest hairstyle trends is getting a seasonal upgrade: the half-up, half-down style. "When I think of Autumn hair, I think of purposeful volume," said Toth, and the perfect way to get it is by pulling a section of hair all the way up on the crown of the head. (To give it a little more oomph, he suggests backcombing before securing with an elastic.) "I wouldn't be surprised to see this fashion-forward Gossip Girl hairstyle everywhere these next few months."