Can't decide whether or not the stars themselves are in on it.
Obviously, they approach the show to be on it. I just watched the Roddy Piper segment, and I'm sorry to inform you of this Roddy but everything she told you is easily on the net.
Owen Harts fall, your father being a cop, Adrian Adonis's real name, the accident...your house fire! You being friends with Kurt Henning. Even interior shots of your house, so she can imagine a room.
Most of that info is on YOUR Wikipedia, and what isn't directly on there, there's links to.
"things she couldn't have known" she didn't say anything I didn't know about you!