Tim McGraw is an eccentric centrist who can dodge the headlock of country-radio culture. So admire “Lookin’ for That Girl,” a hilarious robo-pop earworm radical enough to spur both a Twitter revolt among fans and a radio version dialing back the Auto-Tune. At 47, dude clearly wants relevance with his eminence, as his 13th studio set shows. Alongside the above, it’s hit-or-miss. “Keep on Truckin’,” co-penned by the Warren Brothers, is likable graybeard bro country; the ham-handed, tough-loving “Kids Today,” less so. Per usual, the character studies shine brightest. Proof: “Sick of Me,” a self-loathing take-me-back plea – a reminder that, like Bill Clinton, another great Southern centrist, McGraw is best when he’s feeling your pain.