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.
"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.