30 Day Disney Princess Challenge. Day 6- Prettiest Princess: Belle. Now all the princesses are beautiful, there's no denying it. But for me, Belle just seemed to look pretty in anything she wore throughout the movie. Simple, but pretty. She's beautiful inside and out (as all the princesses are), but she's the one who saw the beauty in others, looking past their appearance and seeing them for who they truly. "For who could ever learn to love a beast?" Belle did.