I Think

There were 3 girls, a redhead, a brunette, and a blonde.
There was this magic mirror, and if you said a lie in front of it, you would disappear.
The redhead went up to it and said :
- I am the prettiest girl in the world.
Poof, she disappeared.
The brunette went up to the mirror and said :
- I think I am the prettiest girl in the world.
Poof, she disappeared.
The blonde went up to the mirror and said :
- I Think...
Poof she disappeared.