My little girls are growing up?

They're getting older I understand that. They're going to be turning 13 (they're having a Bat Mitzvah) in a month and a half. They've found their own identity. Their still similar, but at the same time different. They're both very outgoing, and have a lot of friends. I've also noticed a change in style. I used to shop at target, K-Mart, Macy's, etc. I used to dress them alike every chance I got. And now they're all about American Eagle, that racist store I can't remember the name, but their symbol is a moose, Urban Outfitters, pretty much everything with the name American in it, and whatever other store teens shop at. There was once a time when I couldn't separate them! Now they hang out with there own people. They dyed their hair one cut theirs shoulder length. I knew this would happen, but not so soon! I have two older kids, but they're both boys. Any advice?