Chris McMillan is an in-demand hairstylist. So much so that Jennifer Aniston practically has him on speed-dial. Needless to say, we were pretty pumped when the Living Proof brand ambassador sat down with us while he was in New York last week to talk all things Summer hair. What we learned? Well, the '80s (and the shag!) are making a comeback. Plus, he shared a ton of easy, breezy beauty hacks to get you through Summer's hottest months without touching a hair dryer. Read on for his exclusive hair tips and tricks, and watch him in action in a never-before-seen video showcasing how to create beach waves while you sleep and the simple way to get a twisted-back, half-up 'do.