East Brunswick's Jax took on the biggest song in the country on Thursday night's "American Idol" to mixed reaction from the show's judges.

Jax after her performance on Thursday's "American Idol" (YouTube)

With 11 contestants remaining after Sarina-Joi Crowe was sent home, 18-year-old Jax performed Taylor Swift's chart-topping "Blank Space" but the judges were not impressed.

"I didn't feel really Jax on that song....I didn't get that special thing, that special quality you have in your voice," said Jennifer Lopez.

The sentiment was echoed at the judges' table on the show's "Get the party started" night.

Harry Connick Jr. said Jax had performed a "carbon copy" of Swift's version. Keith Urban felt she had struggled with the song and advised her to choose something next week that let's her "be Jax."

Show mentor Scott Borchetta, CEO of Big Machine Records, worked with all the contestants on their songs and explained Jax's choice. "She does a lot that is a little left of center and she wanted to hit a target that is pop culture today," he said.

Big Machine, which is Swift's record label, will sign this year's "Idol" winner to a contract as the grand prize. Borchetta called Jax “the epitome of all the good things about the '80s mashed up into 2015" and said she "has what it takes" to win the competition.

There are 3 ways left to vote for Jax by noon on Tuesday.

  • Super Vote via the American Idol app
  • Facebook
  • Search “American Idol Vote” on Google

The results will be announced Thursday, March 19, when the show goes to a once-weekly