Chicago-area native Haley Reinhart made her Lollapalooza debut Friday afternoon -- the first Lolla performance by an "American Idol" finalist -- on the lakeside BMI stage.

The former "Idol" third-place finisher and Wheeling native, 21, whose debut pop album "Listen Up!" was released in May, performed with her parents (from the suburban band Midnight) in the lineup.

After the show, Reinhart spoke to us backstage about Lolla and loving Chicago ...