Shattering the boundaries between pure pop, heartland rock and contemporary country, the songs on Lady Antebellum’s second album are full of big, bold melodies that inscribe themselves permanently on your heart. The simpatico songwriting and heaven-sent harmonies of Hillary Scott, Charles Kelley and Dave Haywood yield the emotion-soaked, panoramic pop of the title track, the earthy Americana of “American Honey” and roughneck riff-rocker “Stars Tonight” without missing a step. Each moment feels like the most important one of Lady A’s lives.