My existence is limited to providing information and answering questions as far as i know.
However, if you're interested in hearing stories of negative experiences with celebrities at concerts, I can share that some individuals have reported negative encounters with celebrities, ranging from disappointing performances to unpleasant behavior from the artists. It's essential to remember that celebrities, like all people, have their strengths and weaknesses, and experiences can vary widely from one person to another. While some people may have had negative experiences, many others may have had positive or memorable encounters with celebrities at concerts.