'Believe' Director Reveals What Justin Bieber Is Really Like

'He's not that little boy we knew,' Jon M. Chu tells MTV News.

Justin Bieber has done a lot growing up since his first documentary, "Never Say Never," was released back in 2011, and that's not just because he ditched the shaggy hair for a mustache.

In the past three years, Bieber has released an album, toured the world and had to learn to cope with some of the negative sides of fame. All of that has been documented in Bieber's latest documentary, "Believe," which was directed by "Never Say Never" director, Jon M. Chu, who told MTV News at the "Believe" premiere in Los Angeles that this film will clear up any misconceptions people may have of Justin.

"He's not that little boy we knew. People think he takes himself so seriously, but if you know Justin, he really doesn't," Chu said. "I feel like all the Beliebers know that because, when you follow him on Twitter, he's constantly making jokes about this or that or his pants sagging or whatever. You know that it is all in jest and is in fun and that he enjoys these things and he enjoys being a star, and I think that's something, from the outside, people just don't get the jokes sometimes."

Fans will get to see some of his prankster ways during the film as he hits the recording studio for Believe and jet sets around the world for his recently wrapped tour.

"He's still the troublemaker. He's still Justin. He's charming as hell," Chu said. "He can get away with anything, but that's the best part. He's the guy that we all watched growing up, and I love that about him, that he loves music so much, watching him create music with nothing out of thin air was incredible."

And it was those moments in the studio that Chu was most in awe of, just how far Justin has come since the first film nearly three years ago, noting that the biggest change in the "All That Matters" singer is how much he has grown "into his artistry."

"I think it's him understanding the power that he has, and he's no longer just following direction or following the way it should be for a pop star. He's making his own path," Chu said. "And I think that's so admirable when you get beaten down every day by the press, the fact that he depends on his Beliebers to be there for him and as his moral compass."