THE LOOK Flippy shag HOW-TO Let hair air-dry. Use a three-inch round brush to smooth out dry hair. Finish hair by using a little wax to help flip the ends with your fingertips. INSIDER TRICK The smaller the round brush, the more curl, so use a big brush to create the little light flip. BUY ONLINE NOW Frederic Fekkai Large Round Brush, $65; sephora.com.