Here’s a sneek peek of Demi Lovato’s upcoming guest starring gig on Grey’s Anatomy. Demi Lovato tweets ‘Demi Interrupted. (from Grey’s Anatomy)’ with this picture from the set.

In the Grey’s episode airing next month, Demi plays a schizophrenic girl.

Quite the departure from “Sonny with a Chance” and “Camp Rock,” huh?