I love vampires. Skilling them up to make them quite powerful is fun, and right now I am looking at how vampires interact with celebrities. It would seem celebrities, the higher level ones at least, are quite immune to the vampiric charm, alluring visage. But I did have one B-Lister fall under my vampire's charm, and that was after topping off the alluring visage trait. What makes it particularly challenging is the weak-minded paparazzi and fans that are almost always around, as they tend to snag the charm easily, and it would seem only so many sims can fall under the spell in an immediate area. I look forward to seeing what more abilities might bring into play versus celebrities. I fully expect to have a coven of high-listing celebrities at my vampire's command, without her even achieving any celebrity rank herself.
No celebrity is immune to the hypnotic trance used for other abilities, such as compelling for a drink, hallucination, and the like. But such acts do tend to mark you unfavorably. If you are going for a bad reputation, of course, then it is no issue. But it can be an added challenge when you want to go for a vampire with a good reputation. And reputation plays very strongly with vampires. My sim has been getting so many judgmental calls complaining about her taking plasma from sims against their will. Such whiners...
LGR's video is great, but I differ with him on occult sims. I love occult sims for what they bring to my game, and with the abilities celebrities bring, I count them as occult as well. They are a status separate from normal sims just as much as vampires and aliens.