The Selena Gomez and Justin Bieber saga went on for almost four years. Jelena, as fans used to call them, had a lot of reported ups-and-downs over the course of their on-and-off again relationship that played out in a very public way. Although both singers have moved on, Selena having found herself again through her mental health journey and Justin having married Hailey Baldwin, the two have used their former relationship for the inspiration of many of their songs.