Cara Delevingne, of course. Luckily for us, the model posted a picture of the backstage beauty look with the caption "melange of blue".
The side-swept fringes, the backcombed curls and all that volume - this was the ultimate sexy, Seventies hair and obviously, Cara and her model friend pull it off perfectly.
One to try at home? This is probably one of those styles that should stay on the catwalk, but somehow, it's very tempting to reach for the hairspray...
See all the highlights from the Marc by Marc Jacobs show below: