All true. But I'll posit there's a subtle distinction between performance and posing.
Liberace? Performance. Elton John, Iggy Pop, any number of gay boyband members who fake being teenage girl heartthrobs? Performance.
Milli Vanili? Posers.
I'm still willing to lay money that rap has by far the biggest % of poseurs of any music segment. I'd bet number 2 isn't even close. By that I mean where the performances are manufactured in addition to the "aura" of the performer.
Ironically, although I cant stand country, I'm pretty sure C&W has the lowest.
(Love rap. Can't stand posers, thats all)
Anyone want to get on a bus with me and go ride over to the inventor of AutoTune and give him a huge Melvin?