Little did the 15-year-old know that he’d end up on stage playing alongside “The Boss.”

When Springsteen spotted the teen’s sign (which read “Missed school… now can I play ‘Growin’ Up’ with you?”), the legendary rocker gave him the go-ahead to join him for a duet.

A tech supplied Testa with an acoustic guitar and the two rocked out with Testa leading the band.

After the song, the 67-year-old musician shared a story about his experience with a guitar when he was 15.

“When I was your age I got my first guitar. I brought it home and I realized it wasn’t about how well you played it, it’s how good you look doing it. So, I got in front of the mirror and I tried some different poses,” he said.

At the conclusion of the performance, Springsteen hailed the lad as the successor to his rock and roll throne.

“I have seen the future of rock and roll and his name is Nathan Testa!” he said.

This isn’t the first time the two have met. In 2014, Springsteen invited then 11-year-old Testa on stage in the same arena to sing ‘Waitin’ on a Sunny Day.’

By skipping class, Testa missed out on English, math, and history but he got a priceless lesson in the school of rock.

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