If you had a chance to watch the HBO special "The Defiant Ones," then you saw how the relationship between Dr. Dre and Jimmy Iovine blossomed. You even get a chance to see how the idea of the Beats headphones came about. Well after Jimmy sold Beats, he joined Apple Music in 2014. But Billboard reports Jimmy is leaving Apple in the summer and it may be because of his Apple shares fully vesting, but Apple didn't comment on it. Jimmy helped launched Apple Music streaming service with his focus on the content and more.