That's an excellent point -- this would have been the place to move ahead, to leave the slut-track behind. Now, having tried to keep going on the old track and failed publicly, if she does drop it, it will be seen as an admission of defeat, rather than a positive choice.
Perhaps we have indeed seen the death of her career. If she can recover from this, it'll be a surprise. I hope for her sake (and her kids' sake) that she pulls it off -- otherwise she'll spiral downward into oblivion almost immediately.
If she hadn’t performed at this show, she might possibly have done well with her new CD. Now, however, it may bomb as well.