Personally, I like boobpedia, as that's their exclusive focus.
The fact of the matter is that, on a lot of celebs, there just isn't enough information to decide whether their breasts are real or not. While I hate the fake look, if the surgeon did such a good job that you can't tell just by looking, what are you looking to do, grope her? On the other hand, if they never take off thier clothes so you can see, what's the point?