Simple Plan have been playing the same songs for 25 years. Lately, they’re playing them to a lot of people hearing them live for the first time.

“Every night we ask people, ‘Hey, how many people are here for the first time?’” drummer Chuck Comeau tells Billboard. “Sometimes it’s like 85% have never seen the band.”

The Montreal pop-punk band is drawing fans who weren’t born when “I’m Just a Kid” arrived in 2002, alongside the original listeners who are now bringing their own kids to shows. Some of the younger crowd have even started calling Simple Plan “classic rock.”

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“And you’re like, ‘What are you talking about?’” Comeau says.

“There’s nothing cooler than what’s happening to our band right now,” he adds.

Much of that can be traced to “I’m Just a Kid” going viral on TikTok , where it soundtracked a challenge encouraging users to recreate their childhood photos.…