Wishing

In a fancy Paris restaurant, there is a magical wish-granting mirror. But it only grants wishes if you tell the truth -- if you lie, you disappear. One day, a blonde, a brunette, and a redhead enter the restaurant and decide to try out the mirror. The brunette goes first.
"I think I'm the smartest woman on earth."
"POOF!" She disappears. The redhead goes up to try. "I think I'm the prettiest woman on earth."
"POOF!" She disappears. The blonde goes up.
"I think--"
"POOF!"

Keep your mouth shut!

A blonde, a brunette, and a redhead go to a festival and a main attraction is a magic mirror that will make you the richest person in the world if you tell it  something true. But! if you lie it will suck you up.
So the brunette walks up and says "I think, I'm the most beautiful woman in the wor ld", and the mirror sucks her up.
The redhead walks up and says "I think, I'm the smartest woman in the world" and she also gets sucked up.
Then the blonde walks up and says "I think.." and she gets sucked up!