Best dressed at last night's amfAR benefit

The event raises money for AIDS research, and is traditional star studded - last night was no exception. Lady Gaga was on hand to open the event with a performance, and true to form her outfit raised eyebrows. Dressed in a white bikini, white beaded biker jacket and matching hat, she had painstakingly covered her face with pearls. The pop star, who performed her new single, 'Future Love', also launched her new M.A.C. Viva Glam lipstick, which will be sold to raise money for the initiative.

Also on hand last night were a handful of our favourite style setters that we're hoping to see sitting front row over the next few days. Chloe Sevigny hit the red carpet, and she'd already got her hands on a Louis Vuitton dress from the new pre-fall collection. We also spotted Mary-Kate and Ashley Olsen (who was wearing a right-on-trend nude jumpsuit that we'd love to get our hands on) and model Doutzen Kroes, as well as new mums Heidi Klum and Karolina Kurkova who showed of their enviable post-pregnancy bodies. And fashion week staples Margherita