It's not hard to figure out why Blake Shelton is leading country's next generation of stars. He's a blue-eyed CMT dreamboat with a famous girlfriend (Miranda Lambert), and he's equally adept at schmaltz-dipped ballads and laugh-out-loud novelty hits. His fifth album leans toward slow, thoughtful stuff, like "Home Sweet Home," in which Shelton flees the Nashville circus for the comforts of a breadbasket backwater. But he's at his best in funny songs like "Green," a proud-to-be-a-redneck anthem that one-ups blue-state environmentalists: "People used to call me backwards/Living out here with a tractor....I was green before green was a thing."