The idea is rather obvious, probably it has already been suggested, still...
Let's say our heroine is a stupid wannabe pop singer (white trash or spoiled rich girl, doesn't matter). So, our white gal decides to record some stuff and goes to music studio. There she meets some cool-n-crazy rap sistaz. Well, the discussion concerning music styles and other subjects starts, goes into insults and then... you got it. White gal gets gang banged in all imaginable ways.