She is! Did anyone find out what she was laughing at?
She said "nice hair" and pointed at something/someone right before that, so something to do with hair I'm guessing lol.
During an interview in Chicago a few shows before that she said one of her dancers took some hair from one of her wigs and put it in his own hair. Maybe he did it again? It's tough to tell because she seems to be saying it to the audience though.