Earlier we mentioned that Demi Lovato joins the ranks of Seattle Grace's guest stars.. well the actress has twittered a pic of herself on the Seattle Grace set so check it out!
Yikes! Demi Lovato's character, Hayley, will check into Seattle Grace ... she's a schizophrenic who self-inflicts pain (check out those gnarly scratches).
Hopefully more deets on Lovato's stint on Grey's Anatomy will be released!
Source: Watch with Kristin