The closest situation to this that I can remember was when the Milli Vanilli scandal hit. Their songs stopped getting airplay overnight. I'll have to do some research when I get home and see if they had any charted records at the time.
As for the album remaining at number one, unless things have changed, the positions are based solely on sales through point-of-sale "SOUNDSCAN" technology and there is a lagtime of a couple weeks. So we may see different results next week.
This is an important entertainment industry story then. Consider emailing Cavuto at FNC. Country music fans have spoken. The world needs to listen.