[Z]

The ones with staying power are the ones with hit songs and a gigantic media presence that has been built up over years. Justin Bieber and One Direction are of-the-moment heart throbs. Kids 20 years from now aren't going to give a **** about them. Genuine stars like Beyoncé will always be in the media, much like Madonna now. Britney Spears for sure - she's been musically terrible for the best part of a decade and she's still an A-list celebrity. Rihanna probably, she'll age well I think, and I'm sure Christina Aguilera will still be desperately chasing headlines trying to prove she's better than Britney despite always being better than her.......