Marilyn Manson (not Mansion), is a head of the church of satan. The Beatles put Aleister Crowley on their album cover, and were involved in various weird new age practices.
When a person says he is a satanist, it is reasonable to believe they are a satanist.
Elvis Presley sang gospel songs.
Elvis Presley - In the garden
And for the support of this Declaration, with a firm reliance on the protection of Divine Providence, we mutually pledge to each other our lives, our fortunes and our sacred honor.