I think that when we see a celebrity that we like, whether they be a musician or actor, we automatically assume that we know what they're about.  We make judgements from their style and their sound and we make it into something that we like.  Like if a guy sings acoustic music, people assume that he's either gay or this sensitive, perfect person.  And then if we find out that what we think about that person isn't true, we're crushed and we can never think of that person the same way, and our judgement ruins our perception of said person.

It's a horrible realization because we all know that it's true and we all know that we've done it before.