When Huey Walker becomes itchy from poison ivy, John Buckner convinces him to cover his face and hands with mud by claiming it is an old folk remedy. When he does so, John tells Huey to put one hand over his heart and the other hand in the air, and sing "Mammy".
Sparkle makes an oft-misquoted comment "We don't need no stinking badges" while undressing Buckner
in the opening credits the lips that are in the opening credits of RHPS appear for a few seconds
It is playing on TV in the apartment where female lead is putting on her makeup at the beginning of the film.