Kid Cudi, whose real name is Scott Mescudi, was called as a witness by the prosecution. Mescudi, the "Pursuit of Happiness" rapper, was once in a brief relationship with Combs' ex, Casandra "Cassie" Ventura .

Rapper Kid Cudi is set to testify Thursday at the New York sex trafficking trial of Sean “Diddy” Combs after one of the music mogul’s ex-aides finishes telling the jury about the threatening world he recalls encountering when he worked for Combs.