The singer is one of the prosecution’s key witnesses in the case against the music mogul.

The singer, expected to be prosecutors' star witness, took the stand in Sean "Diddy" Combs' sex trafficking trial on Tuesday.

The R&B singer Cassie has taken the witness stand in her ex-boyfriend Sean “Diddy” Combs' sex trafficking trial. The trial ...

At the center of the prosecution's case is Sean 'Diddy' Combs' former girlfriend and protege, Casandra 'Cassie' Ventura.

Sean "Diddy" Combs—who is facing sex trafficking, racketeering and transportation to engage in prostitution charges—was seen ...

Sean “Diddy” Combs’s Manhattan Federal Court sex-trafficking trial enters a new phase Monday, May 12 with opening statements.

The 55-year-old hip-hop mogul has been charged by federal prosecutors with sex trafficking, racketeering conspiracy and ...

Sean "Diddy" Combs' ex-girlfriend, the singer Cassie Ventura, took the stand Tuesday at his sex trafficking trial in New York City.

The singer, whose real name is Casandra Ventura, became emotional at one point during her first day of testimony, saying she didn’t want to disappoint Sean “Diddy” Combs.

Follow The Post’s live updates from the sex-trafficking trial of Sean “Diddy” Combs in Manhattan as his ex, R&B singer Cassie, testifies as the prosecution’s star witness.