With hands strategically placed, the young singer is shown in numerous sexy photos that don't reveal her completely in the nude, but the photos may go far enough to get booted from the show, People magazine reported.
Barba's case is not the first like this that "American Idol" has seen. Season 2 finalist Frenchie Davis was thrown off the show after topless photos of her were posted on a porn Web site.
Amanda Coluccio, who auditioned with Barba, ironically told People that Barba will "represent New Jersey in a classy way."
The show's producer Nigel Lythgoe, told EW.com that he was unaware of the photographs.
"We have really good background checks on everybody, and we deal with that every season," he said. "It's sad, isn't it, that your best friends are the ones that come forward with information that will go to Smoking Gun or put your photographs on the Web?"