From the pounding thump of its programmed drums to its synth-based violins (a literal embodiment of the term “heartstrings”), Carly Rae Jepsen’s 2011 smash “Call Me Maybe” ranks among the best songs about young love ever recorded — a masterclass in pop songwriting that perfectly captures the thrill of infatuation. Its success also represents a sea change in music marketing, one defined by both read more…