Justin says, "I don't even know this Yeater girl." What do I think? I think Mariah is just some crazy Bieber fan that went way too far.. I apologize for what I'm about to say about Mariah Yeater, but it's the truth! This woman is clearly mentally ill! I've known Justin for a while, and I know he'd never do that. Plus, he has a great mom who teaches him what to do and what not to do. What kind o...