#7 Whitney Houston
Whitney Houston was an American actress, singer and model. Guinness World Records named her as the most awarded female actress of all time in 2009. She went to the Sierra Tucson rehab to get a treatment for drug addiction. She was reported to consume drugs, such as marijuana, cocaine and even sleeping pills. In 2000, Houston was arrested with bags of marijuana and partially smoked joints. In 2006, she entered the Sierra Tucson to kick out her drug addiction.