Most of us aren't afraid of ghosts because we know they're not real. I mean, that's obvious, right? In fact, the only time ghosts are actually scary is on movies or television. But not everyone is as skeptical as you and me. Because there are some people who do believe that there is such a thing as an afterlife. And that restless spirits roam the Earth. (Because they have unfinished business.) And a lot of those people who believe that stuff? Well, they're famous people. So here are some celebrities who believe in ghosts. But be careful. They might make a believer out of you.