As she performed the song "Gang Bang"
Madonna got on stage with fake guns on her hands, "shooting" the dancers and saying all the time "die bitch die".
OK we got it, she is a pop star, a performer, but in Colorado/ Aurora some time ago, a maniac shoot people at the cinema on "The dark knight rises" movie's premiere.
One person from the audience said: "We're dancing and all of a sudden people started realizing what the song was. We all just stood there. Everybody who was around me all had shock on their face. I heard a lot of wows. You could see people kinda looking at each other, I heard the word Colorado, Aurora, shooting. I saw two or three people get up and grab their stuff and actually leave their seats."