Kate Moss did more than spark pregnancy rumours in her Vogue Icons outfit this weekend - she revived a major 1990s hair trend, the grunge bun. It's the look her best friend hair super-stylist James Brown first created in the early days of the supermodel's career and he confirmed exclusively to Grazia that it feels like exactly the right time to bring out the bun again. Why? Because it's officially the cheapest and chicest way to update your do in a flash. Take note of how the A-list are working the trend. SJP's opted for a classic ballerina style bun, Nicole Kidman channels her trademark elegance with a low-slung version and Diane Kruger has added an edgy vibe with a messy, rock-chick twisted up-do. But the fashion insider's favourite for this season has got to be the bun we spied backstage at Luella - a top-knot bun. Turban tie optional!