The latest from this chart-topping country frat boy is the best spring-break concept album ever recorded. It’s also the worst, and probably not the last. The titles tell the story: “Suntan City,” “Buzzkill,” “Sorority Girl.” There are fine country variations on this theme (cf. Brad Paisley’s “Water”), but Bryan’s songs are witless and boring. You end up with a contact hangover, depressed about American higher education.