So according to this post at justjared.com, Paris Hilton will be in an episode Supernatural.

Appearantly it's said that we should "trust Kripke" with this. Well..whatever that means. I had a very what the fuck moment but then I remembered this talkshow I saw ages ago where Jensen spoke less favorable of seeing her at his movie premiere nd now I'm really all amused!

Also kind of cool that the folks at justjared.com used this very cheap picture of her in the post.