You've seen his work at the Oscars, Golden Globes, the Met Gala and pages of magazines likeVogue, W, and Harper’s Bazaar. His roster of A-list clients is crazy long (including Kristen Stewart, Rooney Mara, Reese Witherspoon, Jennifer Garner and Kirsten Dunst) and he collaborates with famed photographers like Mario Testino and Annie Leibovitz. He's Adir Abergel, celebrity hairstylist and Virtue Creative Director, and BTC secured an exclusive interview with the most in-demand stylist in Hollywood. Check it out below and scroll through the slideshow to see how…