"Toronto teen Shawn Mendes achieved a No 1 EP on iTunes the millennial way - by covering six seconds of a Justin Bieber song on the micro-video platform Vine. Once he'd acquired thousands of followers, a record deal materialised, and now, age 16, he's releasing his debut album. It's usually challenging to detect much difference between Bieber and the social-media stars who've followed him, but Mendes, to his credit, steers clear of bleached-out Bieberean R&B".