Natalie and I have both depended on Heidi braids to make it through humid New York summers. The 60 second up-do is the only way, or at least the only chic way, to guarantee all of our long hair stays out of our face and off of our neck. We never understood why Sienna Miller received such negative reviews for, among other things, pulling her wispy blonde hair up into the same look. Now it seems the criticism has dissipated and pretty girls everywhere are catching on to the easiest and cutest way to wear long hair. We've spotted Mamie Gummer, Lauren Conrad, a random fashionista at Style.com's party, and Christy Turlington (for Chanel) with Heidi braids atop their heads - and that's just this week, it's not even summer yet! So if your hair's not long enough, start using horse shampoo, forego monthly trims, and please, please, please don't stick a fake braid on your crown.