Premise: "Dead Celebrities" is the eighth episode of the thirteenth season of the American animated television series "South Park". The 189th overall episode of the series, it originally aired on Comedy Central in the United States on October 7, 2009. In the episode, Ike is haunted by the ghosts of dead celebrities until Michael Jackson, who refuses to accept death, possesses him.
Hypothesis: There are ghosts in every episode of "South Park."