Watch Brave 'Idol' Contestant Wow Judges With Brilliant Mashup

"You're a smart son of a gun."

23-year-old Mackenzie Bourg's genius "American Idol" audition featured a surprise sure to please judges Keith Urban, Harry Connick, Jr. and Jennifer Lopez.

Bourg, a singer and guitarist, took to the floor to perform an acoustic mashup of the judges' own songs, mixing Urban's "Stupid Boy" and "Making Memories Of Us" with Connick's "Come By Me" and Lopez's "Love Don't Cost A Thing.

Bourg's simple, stunning voice did each of the songs justice while providing a fresh spin well worth hearing.  

"I love hearing my songs done so different than the original. It makes me think about doing it that way," Lopez told the other judges after handing Bourg his ticket to Hollywood.

A clip of the audition, uploaded to the show's Facebook page, has been well-received by the public, with one user writing: "I can't believe how seamlessly he put those very different songs together. One of my personal favorites so far."