So you jumped on the undercut bandwagon, now what? Growing out shaved sides or even a short pixie doesn't have to be a painful process; just follow Rosario Dawson's example. Rosario covered her shorter side with a sideswept chignon at last night's Trance London premiere. Her polished look is just one way to disguise shaved hair. Ursula Stephen, the stylist behind Rihanna's famous undercut, shares her tips for lengthening the look gracefully.