Taylor Swift's swept-back waves are "very classic, very 1930s glamour-girl-on-Hollywood-Boulevard," says Nicholas Penna Jr., head stylist and owner of Salon Capri in Newton, Massachusetts. "Plus, these waves will look great after you take them down. They're the perfect base for a second look at the after party."
How to do it: Use a curling iron to create Swift's spirals. For loose waves, choose a large-barrel iron. For tighter ringlets, use an iron with a smaller barrel. (Or, try using both sizes to create a combination of curls.) Then, sweep curled hair back into a loose bun. Secure with plenty of bobby pins, preferably in a matching color so they blend right in. If your teen wants to switch up her look later in the night, she can just remove the pins and tousle.