excuse me if i have misread or not understood anything, but i swear she is just a model right? if so, even though it was a crappy performance, you gotta give her credit for being a model and playing the piano. i mean, what can most other models do, eh?
and about the audience, you will find that in the world of Pop music and fashionable people, their audiences would clap for anything. half these people in the Pop industry put on terrible live performances, yet their fans just yell out because they are like idols to the fans.