Photos of a heavy-set Kelly Clarkson taking the stage at KIIS FM’s Wango Tango concert this weekend show that she may have backed off of her weight-loss program from earlier this year. In January, Clarkson debuted a slimmer physique in her video for the single, … Magazine. However, noticeable weight gain from a March 11 American Idol performance, coupled with recent concert photos show that Clarkson may have fallen off the wagon. AP. Getty Images North America …

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