Famous people are weird. Having crushes on them is weirder.
What does it mean to like celebrities? I don't think it means you actually like those people; you don't even know them. You may think you know them based on magazine articles, television interviews, their public work, but you don't know who they really are or what they're like in real life. Or do you? I wonder how accurately media portrays people. It surely depends on the media and the person in question, but I err on the side of skepticism. I don't think there's any way to truly know a person until you know them personally. The reason for this is because meeting someone yourself involves the least number of mediations: zero. There is nothing standing in between you and the other. There is no interviewer, or producer, or editor, or camera operator, or director, or writer, or any other person who would otherwise get in the way of you making your own judgments. These judgments may be inaccurate. It doesn't mean you still know the person because you may think false ideas or be wrong for any number of reasons. But at least no one else is doing the dirty work for you.

So if liking celebrities doesn't mean liking the actual person (because that's impossible), then does it mean liking what they represent? And what exactly do they represent? Well, they most often represent whatever the media portrays them to represent. And so in turn, you are really just appreciating the side of the person (which may or may not actually be part of the person) that the media is choosing to show. In effect, you are falling for an illusion. This is not unlike falling for someone through rumors, hearsay, stories, folklore, etc. No one is who they say they are, no one is who other people make them out to be, and really no one is who you judge them to be, even when you know them. But that last option is the most suitable for deciding if you like somebody, no matter how wrong you may be.

None of those are really good answers, so I'll spell it out bluntly. When you like a celebrity, you're probably stupid. You probably watch too much TV, and you never read the newspaper. You most likely don't have many friends, or the ones you do have are all as groundless as you are. You probably don't get out much, and your job (if you have a solid one) doesn't put in contact with new people or others' insights and perspectives.

I make a deal out of this because I do not consider myself one of these people, but I have started showing the symptoms lately. Why, why does your singing voice have such an allure..
What my attraction to certain people says about my own personality... That's for another post. But I can assure you I read the newspaper.