Muscle, I think you and other people forget that most actors are hams at heart. I think because CZJ is so serious, gorgeous and austere in her acting, print and modeling work they expect her to be the same in her personal life.
Its my understanding that she is very extroverted, cheeky, bawdy and expressive in her personal life. I think many people expected the Queen of England to walk on stage, based on her performance and that just wasn't happening. I am sure it appeared authentic to those who know her and work with her.
I feel she was sincere. How can you be anymore sincere than showing your crazy, ditzy and bawdyy self to everyone. I dig her.
"The sexual energy between the mother and son really concerns me!"-random woman behind me at Next to Normal
"I want to meet him after and bang him!"-random woman who exposed her breasts at Rock of Ages, referring to James Carpinello