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Kelly Clarkson

Kelly Clarkson showed off her newly slimmed down figure in a low-cut, over-the-knee floral dress at ABC's 2012 Upfront Presentation, where she performed with her fellow "Duets" co-stars Robin Thicke and John Legend. The original "American Idol" winner, who recently turned 30, looked noticeably trimmer, fitter, and more confident as she walked the Entertainment Weekly and ABC Upfront VIP Party's red carpet after her performance. For the past few years, Clarkson's fluctuating weight has attracted a lot of media attention, but the singer has always denied dieting to please critics. "I'm never trying to lose weight -- or gain it. I'm just being," she told Self in 2009. "When people talk about my weight, I'm like, 'You seem to have a problem with it; I don't. I'm fine!'"

ABC's 2012 Upfront VIP Party