There was a magic mirror at a bar

There was a magic mirror at a bar and what ever you say it can’t be a lie or you die.

So a blonde, a red head, and a Barnett walked in that bar.

The red head walked up to the mirror and said i’m pretty so she didn’t die, then the Barnett walked up to the mirror and said i’m prettier and she didn’t die and finally the blonde walked up to the mirror and sad I THINK and she died.