Some women look like scary hags without makeup; Kristen Bell is not one of them. Her skin is fair, but she doesn't look washed-out if she's not wearing much makeup. When she does add some extra color here and there, it basically just adds to what she already has. And what she already has is very good.
Kristen Bell's sex appeal isn't overwhelming. However, few guys would kick Kristen out of bed. The 5'4" starlet is a little spark plug who could probably get things heated up quickly in the bedroom. With a fresh, youthful face, she looks more like a high school girl than an established woman.