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

Sean "Diddy" Combs' ex-girlfriend, the singer Cassie Ventura, took the stand this week 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.

Sean “Diddy” Combs’s federal sex-trafficking trial and high-profile case continues on Day 3 as Cassie Ventura is expected to ...

Sean “Diddy” Combs’s federal sex trafficking trial and high-profile case continues in Day 2 as Cassie Ventura is expected to take the stand.