A new doc­u­ment­ary by Spike Lee recorded during the sessions for Michael Jackson's 'Bad' album is a "treasure chest of findings."

"We have footage in this doc­u­ment­ary that no one's ever seen, stuff that Michael shot himself, behind-the-scenes stuff," Lee announced. "We had complete access to the vaults of Michael Jackson… He wrote 60 demos for the Bad record. Only 11 made it. So we got to hear a lot of that stuff, too, so it was just a great exper­i­ence."

The doc­u­ment­ary is part of a series of releases set to mark the 25th anniversary of the 'Bad' album, with Spike Lee's doc­u­ment­ary due to be released on an unknown date later this year.

"You don't have to be a Michael Jackson-head to enjoy this," Lee continued. "He had a great sense of humour, and he was funny — so you'll see a lot of that stuff."