One of our favorite stars went to Knott's Scary Farm in Buena Park, Calif., this weekend. We only know because she Tweeted a photo of herself there!
Otherwise, who would recognize her with a skeleton face painted on. "Be honest with me," she asked her legions of Twitter fans, "Do I look tired?"
She does look rather scary. Who is she, though? THAT is the question.
Vote below, then click the pic or "View Poll" to see if you're right ...
Who is the star behind the Halloween mask?