Fine-haired girls can add a clip-in extension at the crown to create maximum fullness. EXPERT TIP Start with unwashed hair, or apply finishing cream to washed hair before blow-drying it smooth. Take the top section of hair, from temple to temple, and clip; gather the rest into a medium-high ponytail and secure with an elastic. Unclip the top section, spritz it with volumizing spray, and tease with a brush. Pull that section back and fasten it atop the ponytail with another elastic.