The Estate of Michael Jackson announced Tuesday that Spike Lee’s documentary that looks the King of Pop’s "BAD" album and the subsequent worldwide tour is in the final stages of post production. The film’s release is expected to coincide on the 25th anniversary of the album and will be released on September 18th, 2012. The documentary features over 40 interviews conducted personally by Spike Lee with Jackson’s confidants, choreographers, musicians and other collaborators, including Kanye West, Mariah Carey, Cee Lo Green, Martin Scorsese and Sheryl Crow. the project focuses on Jackson’s career around the time of 1987’s BAD album and tour, which both rocked the globe. "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," Lee said in a statement. "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." [In an interview with the San Francisco Chronicle earlier this week,]( Lee said the film includes a "treasure chest of findings" of never before seen footage. "We have footage in this documentary that no one’s ever seen, stuff that Michael shot himself, behind-the-scenes stuff," Lee said. Besides the documentary, Lee also plans to hold his now annual birthday tribute to Jackson in Prospect Park in Brooklyn, New York, on Aug. 25; Jackson would have turned 54 this year.