Michael Jackson is magical. Who says you can only reincarnate yourself if you're dead? If he was dead,he wouldn't be able to control Miranda because once you're dead YOU'RE DEAD!
Besides, Mikey is going to die soon, so that's why he's already started controlling her. Since Miranda Cosgrove is a guy and not related to Britanny Spears, I think we'll finally have an actress on Nickelodeon who doesn't get pregnant.
That's a new one.