The pop singer has gained steady momentum from his early days uploading acoustic cover songs to YouTube to sharing the mic with Wiz Khalifa (“See You Again”) and Meghan Trainor (“Marvin Gaye”). Nine Track Mind is Puth’s major-label debut, spotlighting his sensitive yet assertive singing style. He shows old-school heartthrob flair on “Marvin Gaye,” “Left Right Left,” and “One Call Away.” Along with the Khalifa and Trainor duets, Selena Gomez sits in on the tender “We Don’t Talk Anymore,” confirming that his star ascension is reaching critical levels.