The Swimming Pools hitmaker worked with the Purple Rain star during a visit to his Paisley Park Estate in Minneapolis, Minnesota last year (14).
Time constraints meant a track never came to fruition and therefore could not appear on Lamar's latest album To Pimp A Butterfly, which was released last month (Mar15), although Prince did give him some valuable advice.
Lamar tells U.S. radio station Hot 97, "We was vibing, but we was pressed, (for time) man. I didn't trip (fret) over getting a song done. I really appreciate the actual game he was giving me... He took control of his music. He was breaking down some things that I need to consider in my career. Just really taking control of your creativity."