Why do sooo many muslims put on fake fisads?

I am friends with soooo many muslims. And have family that are muslim. I am Christian, born Christian. Aside from that. So many muslims say they follow the quran and their allah, but they DON'T! They lead fake lives. Listen to music like Lady gaga, p. diddy, and many other foul mouth singers. They dress inappropriate, watch shows related to sex, like Sex in the City etc. Why are there so many fake muslims? As a Christian, I don't watch those crappy sexed up shows, or wear any thing revealing or even listen to those gross singers. So, what's with the fake muslims? And I mean there are a lot of them that are like this.