So there are three girls: an ugly redhead, a fat brunet, and a dumb blonde.
The three girls are at a historical inn. They stop to take a tour. The innkeeper showed them a mirror. He said that if you tell a lie in front of it, you disapear.
The ugly redhead goes up to the mirror and says "I think I'm pretty" and POOF! She disapears.
Then the fat brunet goes up to the mirror and says "I think I'm slim" and POOF! she was gone too.
Then the dumb blonde goes up to the mirroe and says "I think-" and POOF! she was gone.