About a decade ago, Carly Rae Jepsen's career exploded. She went from being a reasonably successful artist on Canadian radio to an international superstar practically overnight, all thanks to one lucky break. After the lead single for her sophomore album happened to catch the attention of another Canadian pop star, the world immediately fell in love with it, setting her on a journey that would see her local hit become an international sensation. But what makes it so dang catchy?