MY THEORY ON WHY MILEY CYRUS IS ALWAYS STICKING HER TONGUE OUT

She's related to Bill the Cat.

https://www.google.com/search?q=bill+the+cat&tbm=isch&tbo=u&source=univ&sa=X&ei=boVrU5vYJsvzoATihIGoAQ&ved=0CDsQsAQ&biw=972&bih=500

And it looks like I'm not the only one who thinks so.