We’re all too cool to crush on modern-day teen idols, right? Wrong! Try maintaining your poise in the presence of Popular Genius, Nashville’s answer to the lunchbox heartthrobs of yesteryear. More Pop Rocks than bubblegum, PG members Andrew, Scott, Luke, Adam and Ryan are seriously talented singers/songwriter/musicians who pump some punky energy into the snoozy, lethargic pop-music machine. They’ve built a strong, growing loyal fan base from their many all-ages touring performances, and their road-honed musicianship shows in fist-pumping sing-a-longs as well as lovesick concoctions like “Consolation Prize” and “Marla.” It’s the latter, though, that’ll remind you of the first time you classified a band’s members as “the cute one” or “the smart one.” Put out some Topps trading cards, guyswe’d sleep with you under our pillow.