I've never thought of our very own Nasty Nick as a celeb, Brian! Sleazeball, sly, manipulative, vindictive, infamous, yes. And although a friend of ours who worked in one of his hotels said he's quite charming, she's always had odd tastes in men.
I don't pay enough attention to what are called 'celebrities' - whatever that means - to judge their repulsiveness. However much of a tosspot some of them appear to be, they probably have some redeeming features, or they wouldn't have any friends. If I had to rack my brains, I'd probably figure Paris Hilton as 'repulsive' for her preening self-obsession, but probably the people who constantly exploit her as possibly even more repulsive.