We couldn’t write this list without including Spears because she’s one of the most well-known celebrities who was in and out of rehab facilities. She notoriously checked herself into rehab after shaving her head in 2007. The pop icon went in and out like a train entering a tunnel. In 2007, her assistant quit because she couldn’t do her job properly.
Those two years were the worst of her career and her fans feared for her long-term health. Britney is a global superstar and most people wished the best for her. She’s an example of what happens when vulnerable celebrities suffer exploitation (via ABC).