We're expecting salons everywhere to report stampedes of girls flocking in with today's fabulous issue of Grazia to request the coolest new hairstyle 'The Shag'. Created by hip London hair guru Luke Hersheson exclusively for Grazia, it's part Debbie Harry, part Chrissie Hynde and we can officially tell you it's set to be the style of summer. Think layers, layers and more layers! So if you haven't seen it yet, then what are you waiting for? Luke's come up with three cool takes for all lengths and styles of hair so there's no excuse to still be sporting that same old hairstyle. We've already spotted Agy and Lily working the look so it's time to get yours... Take a peek at our exclusive behind-the-scenes footage of Luke talking through how 'The Summer Shag' was created – and the appropriate make-up to complete your rock-chick look.