Disney princess DEMI LOVATO is far beyond therapy!

Jonas Brothers Joe’
s GF Demi is yet another merry Mouseketeer trying to shed her squeaky clean Disney princess image by acting out as a schizo.

As in "schizophrenic".

Demi is being admitted to Seattle’s Grace Hospital for a guest spot on Grey’s Anatomy ep "Shiny Happy People"

Not only that but she’ll menace her costars with a loaded hypodermic filled  — with god-knows-what?!

Will Dr. McDreamy be able to quell her anxious terror with a "spoonful of sugar"?

Tune in May 13 – if you dare!

Disney owns ABC, BTW.