Having started out as a songwriter for hire, 24-year-old New Jersey native Charlie Puth got his big break with last year’s huge Wiz Khalifa collaboration, See You Again. His debut album Nine Track Mind delivers credible, vintage soul-pop. With his #1 single Marvin Gaye, feat. Meghan Trainor, Puth has firmly established himself in the league of Bruno Mars. He’s the new Sam Smith for the younger generation. Entertainment Weekly called him “the next big thing in music,” while Forbes predicted Puth would become “a global superstar” — a forecast that seemed to be borne out during his promo tours in Europe and Asia, complete with the paparazzi chasing him in France and thousands of fans screaming for him in the Philippines. At the A in Luxembourg, you’ll still be up close and personal with Charlie…