(Reuters) -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, a day after jurors saw a video of Combs hitting and kicking her in a hotel in 2016.

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