Kelly has been accused of grooming underage girls to be his "pets" by an ex-girlfriend.
In a documentary for BBC Three, Kitti Jones claims that she was forced to have sex with Kelly and others at least 10 times in a "sex dungeon".
Jones, who is 34, dated Kelly, 51, for two years from 2011. But she says she was groomed by him, and met others who had been too.
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"I was introduced to one of the girls, that he told me he 'trained' since she was 14, those were his words. I saw that she was dressed like me, that she was saying the things I'd say and her mannerisms were like mine," she said in R Kelly: Sex, Girls and Videotapes.