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Unforgettable Celebrity Encounters, Courtesy Of Reddit

8. Idina Menzel
One redditor didn't have the best experience with Idina Menzel, who was set to perform at a venue they worked at in college. "She came on three hours late and had very specific food items/demands for her green room and was extremely rude to everyone that worked at the facility. This is a huge facility and just one venue among larger ones that have hosted much more prominent acts/stars," the redditor shared.