Rihanna makes quite a sexy therapist, which is the role she takes in the video for 'The Monster,' her latest smash with Eminem. But she's not Em's only doctor. Dr. Dre also has a blink-and-you'll-miss-it cameo as, well, a doctor!

Em's clearly got something -- or many things -- on his mind. He's also in a straightjacket and is in the middle of a bit of a meltdown. We're never quite sure what's real and what's imagined.

RiRi looks very doctorly in her bob, glasses and lab coat, too. But both she and Eminem are shown to be trapped at multiple times…dominated by the monsters under their beds and in their heads. No, it has nothing to do with the boogeyman, either.

They battle mental demons and slowly unravel.