Kristen Stewart. Rooney Mara. Gwyneth Paltrow. Reese Witherspoon. These are some of Hollywood’s biggest celebs, and they all share one thing in common—their hairdresser. A true creative visionary, Adir Abergel is the one setting trends with not only his celebrity clientele, but his editorial work in collaborations with renowned fashion photographers like Mario Testino, Juergen Teller and Annie Leibovitz in the pages of Vogue, W and Harper’s Bazaar. So it’s only natural that he would be on the cutting edge of hair technology, too. As the creative director of Virtue, a…