In the garages and rock clubs of Mexico, a relentless upbeat pop-punk sound is rising anew. In the wake of influential groups like Blink-182, artists like Allison and PXNDX are remixing the elements of punk—including pounding rhythm and furious guitar—and replacing the angst and anger with energetic optimism. The starry-eyed lyrics and blissed-out hooks make for a unique pop-punk party.