Kelly Clarkson
is looking great these days!

The original "American Idol" winner showed off her new, slimmed-down physique at the Billboard Music Awards in a revealing red dress -- definitely a sexier and more skin-ful look than we're used to seeing on the singer.

Not only did she look amazing, she also sounded stellar as well -- singing her new single "Dark Side" during the awards show.

We're guessing the weight loss has something to do with her new summer reality show, "Duets," and her recent tour.

Whatever it is, it's working, and Kelly looks good!


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