Scooter Braun, Justin Bieber and Usher

The singer and his creative counterparts gathered at Regal Cinemas in L.A.Live on Dec. 18 for the world premiere of Believe. Directed by Jon Chu, the documentary embraces some (though not all) of the controversy in the superstar's evolution: it shows a particularly vulnerable Bieber — still reeling from a nasty run-in with the paparazzi in March, a crushing breakup with longtime girlfriend Selena Gomez and the death of Bieber superfan Avalanna Routh of cancer at age 6, which shook him to the core.