ToplineSean “Diddy” Combs’ ex-girlfriend, Cassie Ventura, took the witness stand Tuesday morning in what could be a days-long testimony crucial to the government’s case against the rap mogul, in which Ventura testified Combs would frequently subject her to physical abuse and coerced her to participate in “freak-off” sex parties (Combs has pleaded not guilty to all five federal charges).

Sean Combs' lawyers objected Tuesday after prosecutors asked Cassie Ventura about baby oil 20 times.Details of this private discussion at the judge's bench were released Tuesday night."I will not ask any more oil questions,