Saying "Pretty Princess" in Japanese?

Hello, my wife is Japanese and we just recently had our first child a lovely baby girl. My nick name for my daughter is my "Pretty Princess" and I would really like to be able to learn how to say this in Nihango in the context that I am saying to her. If anything I think my mother and father and law would get a kick out of knowing what I am saying and it might make my wife smile a little as well to hear it in her native tounge. Many thanks for all your help!

David,

Ohime sama(おひめさま), I think.

Some daddies call his daughter Hime, simply.

Many thanks! I'll give them both a try and see how it goes. I like Hime for being short but putting that sama on the end sounds nice to. Much apprecieted.

「きれいなひめ」？

Kawaii Ohime-sama
かわいい　おひめさま

Im a Japanese woman and feel comfortable with this expression.きれいな　ひめ（kireina hime)is sort of wierd to me,thouth I cant explain why.

gook luck!