For her spring 2011 collection, Victoria Beckham went for the unexpected. From the front, models appeared to have straight — and straightforward — hair. But in the back, a seemingly sleek hairstyle revealed a wave. To provide volume, lead stylist Didier Malige prepped dry hair with Fekkai Advanced Full Volume Styling Whip. After creating a middle part and applying hair spray to add weight, he used a twin-barrel curling iron to create a single crimp in back. The result: an updated take on the mod look.