“I wanna shake some action,” these Kentucky alt-rockers holler on their second proper record. The line quotes Sixties garage hippies the Flamin’ Groovies, but the track bumps like dance pop, and 21-year-old singer Alex Kandel has some Nashville and a touch of Memphis in her voice. Sleeper Agent make it feel natural with hormone-popping exuberance (“Take It Off”), sharp songcraft and digital-era polish. They can sound like suburban kids banging away in the rec room – even when they’re playing a cagey, Blondie-worthy discorock tune called “Eat You Up,” about burning out before your time. “Our days are numbered,” Kandel sings with a wink. She’ll go down punching.