Nicole Kidman – Lepidopterophobia

Although she's proven her acting chops time and time again, there's one real-life act Nicole can't conquer: facing her fear of butterflies. As a young schoolgirl in Australia, she came home from school to find "the biggest butterfly on Earth" waiting to greet her at her front gate. She's been traumatized since. The Moulin Rouge! actress tried to confront her self-described "bizarre" phobia by visiting the butterfly exhibit at the American Museum of Natural History, but she crumbled and flitted out of the building.