40. Katey Sagal
In Sons of Anarchy, Katey Sagal plays one of television's strongest female leads as the frankly sexual matriarch of a outlaw motorcycle club—a real badass. It says something that the part was written for her. The actress, singer and mother-of-three celebrated her 50th birthday by getting a tattoo of a reptile on her ankle bone, saying she felt she needed to mark "a new part of [her] life."