The demon jumped ship into Katy Perry.
Let me demonstrate
Era One: Miley is not possesed

Era Two: Miley is possessed by the Unknown Demon

Contact: Miley comes into close contact with Katy Perry

Transfer: Uknown Demon makes leap into Perry

Recovery: Miley recovers from possession

First Murder: Katy Perry, Possessed, proceeds to kill a Nun via stress in a legal battle over the purchase of a convent

This concludes my lecture on the rampant demon problem in Pop Music circles.
This is…quite convincing…












