...Usher song, "Bad Girl," which is about pimping.
Somehow I don't think that one came from a religious source.

Well, Usher's song could be a take off of the Blues song, and some lines from the Blues song could be from that religious song...

Therefore the pimping song could be said to based on a religious song-at least in part...

Of course, you can say anything. That doesn't mean it's true.