Who directed Justin Bieber's concert film "Justin Bieber: Never Say Never"?

Explanation

On 29 November 2010, the first tickets were released for Justin's concert film "Justin Bieber: Never Say Never". On 9 February 2011 a pre-release took place for selected guests, but the official world release was on 11 February 2011. The film is a 3D documentary, which follows Justin's life for 10 days."Justin Bieber: Never Say Never" was directed by Jon Chu and is the highest-grossing concert film since 1984.