Hair this week has swung the arc from long and flowy to super-tight ponytails. But next spring, break out your best Pucci scarves and rock them as headbands. Diane Von Furstenberg’s gals had their hair wrapped in four-inch-wide swaths of fabric — with a cute flower to boot. Monique Lhuiller used a delicate snippet of fabric to keep locks in place. And Nanette Lepore tamed voluminous updos with printed kerchiefs, creating a look that was both chic and sexy.