A blonde, a brunette, and a red head all went to an antiques store and saw
a mirror.

The lady working at the store said, "This is a magic mirror, you must say
something true and if it's true you can make a wish and it will come true.
If it's not true you will disappear."

The blonde, red head, and brunette bought the mirror and brought it home
with them.

First the red head walked up to the mirror and said, "I think I'm the most
beautiful girl in the world."

Poof, she vanished.

Then the brunette walked up to the mirror and said, "I think I'm the
smartest girl in the world."

Poof, she disappeared.

Then the blonde walked up to the mirror and said, "I think...."

And Poof, she disappeared.