I the pictures in the article, she's literally wearing dark makeup. This is what she looks like without it: http://richestcelebrities.org/wp-content/uploads/2014/11/Zoe...

Light-skinned for a black woman. Historically, lighter women were sometimes able to 'pass' as white, so it's a term with a lot of significance. Even today there's a fair amount of colorist (in both directions) in some communities.