Songfacts®:

• "Young & Dumb" is a 2025 single by Avril Lavigne featuring Simple Plan, released on May 9 to coincide with the kickoff of the second leg of Lavigne's Greatest Hits Tour. The track marks a full-circle moment for two of Canada's most beloved pop-punk exports, reuniting more than two decades after they first shared a stage. Back in 2003, Simple Plan opened for Avril on her Try to Shut Me Up Tour at the height of their early-2000s fame.
• The song is a three-minute power-chord hug for fans who grew up moshing, mall-haunting and doodling band logos on their jeans. Lavigne kicks off the track reminiscing about "livin' like a rockstar" and "trashin' hotel rooms" in the early '00s. Then Simple Plan jump in, fast-forwarding "20 years later" to declare, "Somehow it feels like nothing's changed."
  
  It's a fist-pumping toast to the glory days that somehow never stopped.
• Lavigne said that back in 2003 they were "just a bunch of kids from small towns in Canada chasing dreams."
  
  "This song is for our fans," she added. "It's a tribute to the past, but also a celebration of the present. In our hearts, we're still those same kids."
• Lavigne co-wrote the song with Simple Plan frontman Pierre Bouvier and drummer Chuck Comeau. It was produced by John Feldmann, who previously worked with Lavigne on her 2022 album Love Sux.
• Directed by Brad Bischoff, the video shows Lavigne and Simple Plan trashing hotel rooms like it's 2002 and fooling around by an empty pool like they never aged past 19.