Contrary to popular belief, you don't need a wand (or even a gym) to work some hot-for-summer magic. Whether you're a size two or a size 22, you've probably had the experience of test driving a look that's just all wrong — the effect is lumpy, your proportions look distorted, and all in all, it's doing nothing for your killer shape. But, before you rummage through every item in your closet, hear us out: We sourced a bit of help from a few in-the-know stylists to help you streamline your look to perfection.Can these professionals really turn your look around? Just ask their clients — that is, if you happen to be in touch with Kate Bosworth, Rachel Bilson, or Katy Perry. These top-notch fashion insiders not only have the magic touch, but they're also dishing on the biggest secrets for looking slimmer in your clothes. Use their words of wisdom to create a sleeker finish ... without ever breaking a sweat.