February 24, 2014 1:29 AM

Demi Lovato rises (slightly) above pop-concert formula

If there's a template for a big-budget pop-music concert, Demi Lovato found it, studied it, followed it to a T. And yet the former Disney Channel star/former "X Factor" judge manages to be just interesting enough to concertgoers who fall outside her core demographic of 12- to 17-year-old girls

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