UNCLE KRACKER A pop-rock hit-maker brings his feel-good groove to country music   His 2001 breakout single, “Follow Me,” was a pop smash. But in recent years, Uncle Kracker, aka Matthew Shafer, has shifted from funky post-grunge rock to country, working with producer Keith Stegall (Alan Jackson, Zac Brown Band) and signing with roots label Sugar Hill Records. What hasn’t changed is the Detroit native’s penchant for fun—a philosophy reflected...