Guys: what makes a girl beautiful?

I'm posting this for guys and women who have a lot of experience with guys. What is your opinion of beauty? What makes a girl beautiful?

A beautiful smile is a plus, along with a good fun personality who knows how to work what she has.... I have seen some very average looking girls with some hot guys....so they saw something they liked... I've seen some very beautiful girls without a guy too because they must be missing something..... beauty is in the eye of the beholder they say ,but there's a lot of truth with that.

beauty isn't skin deep sure pretty girls are considered beautiful but take a beautiful girl who is mean and abusive and a sweet girl that has never been told she's beautiful the true beauty is the sweet girl.