This question was a perennial favorite of us staff members many moons ago while we jockeyed the register at our local video store (Brooks/FC Leslie Video in Leslie, Michigan). There are obvious examples, which I still would like to see if only to gauge their popularity like that one scene in Wild Things. An example:
Rosie Perez dancing to Public Enemy's "Fight the Power" during the opening credit sequence in Spike Lee's film Do the Right Thing