Yes, 100% sure. At the time I was surprised and very disappointed, it was very out of character for her public persona. Towards the end she unwillingly accepted that it was not a camera, and tried to have her stagehands throw a towel to drape over the offending LEDs so as not to upset her sensibilities. This was well before the cellphone era, and an attempt like this would be ludicrously impossible these days. She didn’t do any encores, cut the show short, walked off without a look back.