Watch Spike Lees BlacKkKlansman music video for an unreleased Prince song One of the many impactful elements of Spike Lees darkly comedic yet harrowing BlacKkKlansman is its soundtrack. Along with a score by Terence Blanchard, the 70s-set film features tracks from James Brown, Al Green, and Diana Ross, as well as a previously unreleased rendition of Mary Dont You Weep by Prince. The singers cover is set to be included on the forthcoming posthumous release Piano & A Microphone 1983, and now Lee has released a video for the song featuring clips and images from BlacKkKlansman. Inspired by true events, BlacKkKlansman tells the story of Ron Stallworth , the first African-American detective to serve in the Colorado Springs Police Department - who takes on a dangerous undercover mission to infiltrate the Ku Klux Klan. Watch Lees video for Marry Dont You Weep above.