I'm suprized that anybody who claims to be her manager or Agent allowed her to wear that awfull bikini outfit!
I read that she was to wear another outfit, but at the last moment she changed her mind and picked this awful one. The blame goes to her and only her. As far as her awful performance goes, I read that she was out all night and didn't rehearse the dance steps. (Which orginally were suppose to be a bit more complicated, but she couldn't handle it.)