'Grey's Anatomy': Demi Lovato is a sick girl

Fans of Demi Lovato can check out "Grey's Anatomy" for another scare.

The Disney Channel star is alive and well after a fender bender, but she won't look so hot on her guest-starring stint on the ABC medical show Thursday (May 13).

The singer-actress will play a teenage patient who's brought to Seattle Grace Mercy West hospital to be treated for schizophrenia. As things often turn out, schizophrenia might either be a red herring or possibly just one of many problems, but that's for Karev (Justin Chambers) to determine.

Here's a look at Lovato. Those scratches (self- or other inflicted?) look painful.

demi-lovato-greys-anatomy--01-large.jpgAnd another pic. Wonder what's with the big, creepy eye on the screen?

demi-lovato-greys-anatomy-02-large.jpgThe May 13 episode, "Shiny Happy People," also sees Meredith (Ellen Pompeo) tell her suspicions about Owen (Kevin McKidd) to Cristina (Sandra Oh), and the staff getting caught up in a love story between two elderly patients who've been parted for a long time but reconnected at the hospital.

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Photo credits: ABC