Karrueche Tran was in the dark … blindsided by Chris Brown ‘s baby news just moments before TMZ broke the story. We’re told Tran had absolutely no idea her boyfriend was a daddy — much less a daddy with a baby mama with whom SHE partied. Sources say Karrueche and Brown had a blowout fight a week ago and weren’t speaking, but he tried calling her after the story broke … she did not pick up. Brown is the father of a 9-month-old baby with a former model Nia .
