Best of 2007: Beauty Breakthrough

Ten years ago, most women hadn't heard of microdermabrasion, Botox was used mostly to treat muscle twitches, and the idea of using a gizmo to stop a pimple was for Judy Jetson alone. In 2007, we have a wealth of high-tech ways to treat the tiniest details of our appearance. Which idea do you consider the biggest beauty breakthrough?

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