The singer is one of the prosecution’s key witnesses in the case against the music mogul.

Cassie Ventura, a longtime girlfriend of Sean "Diddy" Combs, said she loved the hip-hop mogul and felt a sense of duty to join "freak offs."

The government calls Cassandra Ventura.” With those five words, the prosecution dove into the heart of the racketeering and sex trafficking case against Sean “Diddy” Combs – the testimony of his former longtime girlfriend.