I hear all the time about occultists with very famous artists as clients.
First of all, in that environment, if it is known about any witchy association you are almost immediately isolated for fear and superstition. So, if they do it is super secret.
Secondly, a famous person will never hire a person known by media only for reasons of privacy. Eventually, they send a messenger before to see face to face how you work and they get the reading done on their behalf. Being a magician you should discover that on the spot right?
Thirdly, some put in their works occult references just to sell more and not because they believe it. It is called marketing.
Siouxsie getting a reading.