Heidi KlumTHE LOOK Upsweep with large bun HOW-TO After washing your hair, apply a volumizing spray. Pull hair into a high ponytail and secure with a hair-colored elastic. Pull all hair together and begin winding around the ponytail and secure the entire bun with bobby pins. INSIDER TRICK If you're getting this professionally done, ask your stylist ahead of time to have a hair piece that matches your color, says Xavier Cruz. BUY ONLINE NOW Bain de Terre Rise n' Shine Volumizing Foam, $10; beautydepot.com.