Who's the daddy? Soulja Boy is at the center of a paternity case in which a woman claims that he fathered her child some six years ago.

In legal documents obtained by TMZ, Diamond Shantaniece MacKay claims that the 'Crank Dat' rapper is the father of her child. How does she know? Apparently, there was only one other man she was with during the time and since he's biracial -- while the child in question is not -- she deduces that Soulja Boy is the father.

The five-year-old child reportedly resembles the 23-year-old rhymer and supposedly, he's even visited him in the past. Diamond wants a paternity test, which will undoubtedly turn into a larger child support case if proven positive.

Soulja Boy has been keeping a low profile this year. There were rumors that he would sign to Cash Money Records, heightened when he got 'Rich Gang' tattooed on himself. Those rumors were later squashed by Birdman.