I think it's blown far more out of proportion than Christians would like to admit. Madonna wasn't possessed by a demon...she was possessed with the thought of failing record sales...how did she exorcise this "fear of failure" demon?
She kissed Britney.
Many artists claim demonic influence or possession simply to drum up sales, interest or controversy...Christians offer quite a bit of worldwide free
promotions when properly outraged...righteous anger knows no boundaries sometimes.