I listened to an interview she gave at some point and she talked about herself being an entertainer as opposed to a singer and I thought that was very revealing. So, i think the floor rolling and smeared lipstick and such is about the image of punk and rock. Considering how few kids appreciate punk and rock nowadays, I applaud the effort to keep the image alive even though I too have cringed when I've watched their stuff.
They do have one song though that I really like called I'm Ready. I think that's the one @killuridols is referencing. I have no idea why i like it so much but i do. Lol