Why does Demi Lovato look like she's been admitted to a hospital?

The actress/singer posted a startling pic on her Twitter of what looks to be scratches on her face and an IV in her arm. Thankfully, this is just for her new TV role.

Lovato tweeted: "Demi Interrupted. (from 'Grey's Anatomy')."

The Disney star and girlfriend of Joe Jonas is guest starring on the ABC show. "Grey's" airs on Thursday nights at 9 p.m.

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