Madonna
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When Madonna brought a fan on stage during a 2012 concert, she asked them to sing “Open Your Heart.” They didn’t know all the words and she scolded them, “You really don’t know the song. Shame on you!”
While perhaps not the biggest jerk on this list, just imagine paying a ticket for a Madonna concert (which are never cheap) and then being ridiculed in public; clearly, that can’t fell good, can it?