Vogue says

So what to buy for spring-summer 2010, if you will be shopping? Party dresses - lots of them, to be worn day and night: with interesting (and forgiving) folds around the hip for added shape. A jumpsuit - single shouldered or strapless if you dare. Loose trousers that taper to the ankle, preferably in silk. Bring shoes down a level or two, and if you venture from the washed out palette, make it a bold, tribal or ethnic print. A trench coat, long or short (or turned into a party dress at Burberry). A belt - skinny ribbons or wide leather versions; the waist intends to allow you to show off your curves next summer. And if your curves are that good, swimwear is teeny weeny as can be.