As Kristen Stewart forgets to brush her hair, more celebrities who take emotions out on their follicles ...

Cheryl Cole, face of L'Oréal Paris ... Regardless of iris colour, a strong limbal line (the dark line surrounding the outer edge of the iris, most common in those in their 20s and very noticable ...

Maintaining youthful, supple skin requires a good SPF, and one celebrity who swears by this is Cheryl Cole, the star of Girls ...