WHY IT WORKS Sienna Miller's ponytail has a high fashion edge, thanks to the teased texture and high placement. "The style is chic enough for a night on the town, but maintains a cool, unfussy feeling," Francis says.
EXPERT TIP Afraid to back-comb your strands? Francis advises using thickening spray at the roots for extra body before pulling your hair into a pony. "Pinch out a few of the teased, bumpy pieces until you get your desired undone effect."