My daughter is now 13 and, for both better and worse, she has inheritied her mother's most bodacious endowments. Scares the fuck out of me because she's also quite tall and in general looks much older than she is. My wife has observed college guys checking her out. Those guys are fortunate, because if I had observed them, they would require medical attention.
I am absolutely ecstatic that her favorite clothes to wear are sweats and oversized T-shirts or sweatshirts. I have always, always expounded upon the virtues of wearing clothes that are comfortable, and she grew up taking that to heart. In retrospect, I should have actually promoted the burlap sackcloth as the ultimate fashion statement, and that it's perfectly fine to wear the same thing every day. But this works, too.