Bruce, 67, was midway through his set at the city's Brisbane Entertainment Centre on Thursday (16Feb17) when he invited youngster Nathan Testa to play guitar on his track Growin' Up.

His invitation came after he spotted the teenager holding a sign which read, "Missed school, in the s**t now, can I play Growin' Up with you?"

According to editors at the Sydney Morning Herald, Thursday's gig wasn't the first time Nathan has appeared on stage with the rocker; in 2013, aged just 11, he joined Bruce at the same venue for his song Waitin' on a Sunny Day, and even performed one of Bruce's trademark knee slides.

This time, Bruce's guitar technician Kevin Buell handed the youngster an acoustic guitar and Bruce treated Nathan to a jam session as well as sharing some sage advice he learned when he was an aspiring rock star.

"Before we continue, a lesson,” the Born to Run musician said. “When I was your age, I got my first guitar. I brought it home. I realised, it wasn't about how well you played it, but how good you looked doing it. So I got in front of the mirror and I tried some different poses."

Nathan isn't the only young Bruce fan the rocker has delighted while in Brisbane, as before playing the same venue on Tuesday (13Feb17), he invited backstage Adam Brooker, a boy with learning disabilities, whose love for the E Street Band rocker is so strong his mum used lyrics from his songs to read and write.

Bruce plays his final Australian gig of the tour at Hope Estate Winery in Pokolbin on Saturday (18Feb17), before moving on to New Zealand next week.