It's the rare 19-year-old who's in a position to commission and co-produce a film about himself. Clearly, with this kind of involvement, we can hardly expect Justin Bieber's Believe to be an impartial document.

It's for the fans. And on that level it works.

When the movie occasionally does confront its hero's foibles, its answers are disappointingly pat.

There's nothing wrong with making a documentary about the Biebs, but you wish the filmmakers had thought a lot harder and dreamed a little bigger.