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4. Katherine Heigl
Katherine Heigl was on the top of the world before canceling herself in the 2000s for no apparent reason. Heigl was landing lead roles in everything early on in her career, and started it off by starring in WB’s teenage drama “Roswell”. After landing a role in the Thursday night sensation “Grey’s Anatomy”, Heigl could’ve landed any movie role she wanted. Until it came out she was a terrible person to work with. Reportedly, Heigl edits her scripts without permission, refuses to leave her trailer at times, and often acts entitled to cast members and crew in between takes. She also snubbed her Emmy nomination because she thought the writing of her character on “Grey’s Anatomy” wasn’t deserving of the prestigious award. Yikes.