Singer Cassie Ventura also known as Cassie arrives for the screening of Killing Them Softly at the 65th international film festival, in Cannes, southern France, Tuesday, May 22, 2012. (AP Photo/Lionel Cironneau,

For six hours on Tuesday in a Manhattan courtroom, Cassie Ventura testified about how her decade-long relationship turned violent with then-boyfriend, Sean "Diddy" Combs.

Cassie Ventura's testimony in Sean 'Diddy' Combs' trial revealed disturbing details of their relationship. Ventura stated that Combs insisted she call

Prosecutors' star witness, Sean "Diddy" Combs' ex-girlfriend Casandra Ventura, took the stand on Tuesday in the hip-hop mogul's sex trafficking trial, accusing the rapper of controlling her life and coercing her into "humiliating" sex acts.