I think you need to look at it the other way

She is young and vibrant as we were all years ago when we were at her age. She is keen to exhibit her better part.  It is ok for you to keep some reservation on how young women should be addressed, whereas you also need to respect and accept those Y-g for who they are and what they like. I mean, please, look around! This world is not what it was like, even 2 years ago. With so much temptations and influnences around? Do tell me you are expecting your daughter to grow up the way you did exactly. Even if you are feeling obliged to say something, get your fingers crossed, I bet they wouldn't listen to you or couldn't care less.