Oz:
I am not into popular music, but rather gospel music.
Having said that, I have lately come to the conclusion that it is the record labels which dictate what is played on the Christian stations. I have picked up hints of this:
*I called a Christian station in Baton Rouge and requested a particular song which I really liked, but which I never heard on the radio. The DJ must have slipped up, because he told me that that song wasn't on their playlist which was given to them by the record label. And over time, I have come to notice that no matter which Christian radio station you listen to, they are all playing exactly the same music, with almost no variation.
* Sometimes you will hear songs on the Christian radio stations which are nice songs, but which aren't really "Christian" songs. And all of the Christian stations play those same songs over and over and over. I finally realized that there is no preacher in the back room selecting the songs, but rather the record labels.
* Lately you hear lots and lots of "black" sounding Christian music, from white and black artists. This happened all of a sudden, and, it seems, on all of the Christian radio stations simultaneously.
A particular Christian singer I spoke with recently advised me that if I write any music, I should NEVER sign over the rights to any record label, because one day I may end up paying them for the right to sing my own music. He also told me that if the labels decide that you aren't what they want, you will DISAPPEAR from the music scene.
Maybe I should try Europe.