Cassie Ventura, the former girlfriend of Sean “Diddy” Combs and one of his accusers, could take the stand as early as Monday as one of the first three witnesses called in the government’s sex-trafficking case against the music mogul.

The “Me & U” singer was seen cradling her growing baby bump while waiting outside of a friend’s brownstone apartment building in Manhattan Wednesday.

The 38-year-old "Me & U" singer, whose real name is Casandra Ventura, stepped out in a light grey sheer sweatshirt and white linen pants, while holding her cell phone outside on the stoop of a brownstone apartment at her friend's home.