For Sarah Pidgeon, playing Carolyn Bessette in "Love Story: John F. Kennedy Jr & Carolyn Bessette" came at a painful cost. To transform into the character, Pidgeon, 29, dyed her brunette hair blonde, matching Bessette’s signature style. "I went in to audition for Carolyn with long, dark brown hair, and have since gone blonde, which is a whole process," she shared in a Vogue makeup routine video . "But we also have to be really careful because I have psoriasis, and obviously it's quite an