Rihanna

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Armchair psychologists can have a field day with Rihanna's romantic issues and her childhood. The pop star's dad was a drug addict and physically abusive to her mother, who divorced him when Rihanna was 14. "He was one of the best fathers," she told Oprah. "As awful as he was to my mom at times, it didn’t compare to how great he was as a father." They reconciled in 2010, a year after Chris Brown beat her. Despite that incident, Rihanna's father says he likes Brown, calling him and Rihanna "the perfect couple" earlier this year.