one run away goat get busted

Three girls are walking in a magical forest. Suddenly, a witch comes out of the woods, and tells them:
"Each of you has to say one good thing about herself. If you lie, i will make you disappear!".

The first girl, a brunette, says:
"I think I am a very kind and toughtfull person".
*Pooph*- she disappears.

The second girl, red-haired, says:
"I think i am very sexy".
*Pooph*- she also disappears.

The third girl, a blonde, says:
"Well, I think..."
*Pooph*- she is gone...