When it comes to “bands” like Backstreet Boys and Britney Spears, usually they really aren’t famous, they just appear to be, because of evil rich publicists pushing them into our faces, putting them on every network. They give the illusion that they’re really famous, saying “look at all the fans they have! Why aren’t YOU a fan!?” but they don’t really have that many fans. It may have been my imagination, but I remember seeing a Backstreet Boys concert on TV, and there were obvious sounds of girls screaming, but when the camera went over the audience, they all looked rather bored. Or they looked like they were paid to act excited. And the screaming girls sound effect sounded like it was dubbed over. That’s why publicists are evil.
BTW, I disagree with a lot of the people mentioned here, but I’ll second Elvis. He’s not good-looking (as far as I can tell, I’m a straight male) and his songs aren’t even good.