The first 30 seconds of the music video for "Dancin' Away with My Heart"—the third single from the third album by Lady Antebellum—is perhaps the quickest capsule of everything you need to know about the trio. The members walk through underground hallways in arenas and stare into backstage mirrors, footage that's interspersed into shots of the massive, sing-along crowd. So, lesson one: After three albums, Lady Antebellum is one of the most popular country acts in the world right now. Before the sad song gets going, though, the members share anecdotes about their first dance: Dave Haywood first danced to Garth Brooks in seventh grade, while singer Charles Kelley first moved to Tim McGraw's "Don't Take the Girl." So, lesson two: Lady Antebellum prolongs the line of country-pop superstardom that stretches from Brooks to Dunn to McGraw to Chesney to Swift to Flatts (but not Scruggs). With Darius Rucker and Thompson Square. —Grayson Currin