Well they don't only claim to be controlling the music industry...
They basically control all forms of media, politics, government, military, etc.
Although the military wouldn't know since they are under the control of the Commander in Chief (President).
And, its claimed that the president is directly influenced by the illuminati. It is also claimed that not all presidents are in control by these people, but if we dig enough, you see that some presidents are within this organization or they fall under them as they continue their terms.
Who knows the truth...
But as far as we continue on in life, its more and more convincing that it is like this...
I mean, one world order, government issues, currency changes, music art, tv content, the bible saying this and that, celebrities disappearing / passing away, etc etc etc.