Chris Brown has a nine-month-old baby girl with longtime model friend Nia, 31

Brown is pictured last month with on/off girlfriend of four years, Karrueche Tran, who is not the mother of his young child

Chris Brown, 25, has a nine-month-old baby girl with a longtime friend. The mother is a 31-year-old former model named Nia, TMZ claimed on Tuesday. The website added that the woman has 'known Chris for several years'. Sources connected to both Nia and Chris told the site they are 'on very good terms', however they are currently not dating. The Loyal singer has been romantically liked to model Karrueche Tran for the past four years. However the pair's relationship has always been rocky, and the pair have frequently split before reuniting. The pair were seen together last month, hand in hand at New York Fashion Week. But back in December, Chris launched a lengthy attack on his girlfriend via Instagram.