So....I don't believe in "religious" Satan but I believe in colloquial satan and the problem isn't so much the entertainer but the audience and the promoters. The easiest way to get attention and media adulation (which translates to free promotion and sales) is to be provocative, especially if you're only marginally talented. Taking your clothes off and worshiping Satan is pretty provocative.
It's possible that these entertainers literally sold their soul to Satan in exchange for fame and wealth, but what's way more likely is that they donned this demonic costume like a Gaga meat dress for attention and accolades from the perverted media. So if you think the MSM and entertainment industry is "satanic" then legit they sold their soul to satan.
Old people were all discombobulated by Black Sabbath and Alice Cooper when I was a yoot.