Sienna
I'm not normally a fan of Sienna Miller's ensembles, but when she wore that gorgeous gold Burberry dress to the Anglomania MET ball recently, well, no-one can deny just how stunning she looked. If you'd like to snap a similar look up for under half the price, check out this gold sequin bow dress from Marks & Spencer's, for £110 (it's limited edition, mind, so you better hurry!), black opaque tights from mytights.com for £7.95, the Roxanne suede slingback platforms from Kors by Michael Kors for £155, and the black snakeskin-look clutch bag from Faith, on sale for £10.80. Just make sure you leave Jude Law at home, there's plenty of better blokes out there than him!