Spike Lee is in the final stages of completing a Michael Jackson documentary.

The legendary filmmaker is in the latter part of post-production on the project, which will focus on the story of the late singer's 'Bad' album, world tour and videos to celebrate the 25th anniversary of the record following its release in August 1987.

The documentary will feature more than 40 interviews, conducted by Spike - who directed both short films for Michael's 'They Don't Care About Us' in 1996 - with the 'Thriller' hitmaker's confidants, choreographers, collaborators and musicians who worked on the record.

Spike said: ''I'm more than just a huge fan of Michael Jackson, and having the chance to actually know him and work with him, I deeply care about his legacy.

''With this 'Bad' project I was able to uncover just what made this such a huge, important coming of age in his career and unearth compelling stories surrounding the making of the album, the long awaited follow-up to 'Thriller' - the best selling album of all time - the short films and the tour that may have never seen the light of day.''

Other interviewees featured in the documentary include Oscar-winning film director Martin Scorsese, who helped to bring Michael's songs to life in short films, as well as some of today's top music artists including Kanye West, Mariah Carey, Cee Lo Green and Sheryl Crow, who was a back-up singer on the 'Bad' tour.

'Bad' - the singer's seventh studio album - has generated more than 45 million unit sales and won Michael, who died of acute Propofol intoxication in June 2009, a host of awards including two Grammys, as well as making history with five consecutive number one singles on the Billboard Hot 100 chart.

The 25th anniversary of 'Bad' will also be celebrated with the September 17th release of 'Bad 25', a package featuring three CDs, two collectible booklets, and the first-ever authorised DVD release of Michael's concert at Wembley Stadium on July 16, 1988, which was attended by 72,000 fans, from the record-breaking 'Bad' tour.