The music mogul known as Puffy and Diddy is facing federal charges of racketeering conspiracy and sex trafficking. He has pleaded not guilty.

The sex trafficking trial of Sean “Diddy” Combs, one of the biggest music moguls and cultural figures of the past four decades, has begun.

Ventura, a rhythm and blues singer known as Cassie, testified on Tuesday she acceded to participating for a decade in Combs' drug-fueled parties known as "Freak Offs," often fearful he could become violent if she didn't.