Backstage at Tibi, it looked at first as if they were doing just another low-slung ponytail. Then we noticed hairstylist Frank Rizzieri fastening this long fabric over the base (over an elastic); it fell to the same length as the pony’s end. And then we saw the buckle. We love belted anything—swimsuits, jumpsuits. Now, apparently, we’ll be belting our hair too.