Scarface opens up at launch for his new book, 'Diary of a Madman.'
Music stars hit the streets for police brutality protests.
Afrika Bambaataa, Warren G, Kurtis Blow, EPMD and more billed for July event.
Ten episode series set to coincide with rapper's summer tour.
Jerry Seinfeld talks collaborating with Wale for The Album About Nothing.
Plus Amber Rose feels Plies's pain.