Sean "Diddy" Combs' ex-girlfriend Casandra Ventura, a rhythm and blues singer known as "Cassie," is expected to testify on Tuesday as the prosecution's star witness in the hip-hop mogul's sex trafficking case,

The R&B singer Cassie could testify as soon as Tuesday in Sean “Diddy” Combs’ sex trafficking trial, as the Bad Boy Records founder faces charges that he orchestrated a deviant empire of exploitation that forced women into drugged-up sex parties called “freak-offs.

Sean "Diddy" Combs' sex trafficking trial began with the Cassie Tape being played, testimony from a male exotic dancer and opening statements.