Pharrell and Rubin interview: Now there's a question on what a song is

Producers Pharrell and Rick Rubin interviewed each other in a wide-ranging interview, covering various subject - favourite music, racism versus the hip-hop, technology, as well as 'Blurred Lines' lawsuit which changed what makes a song different - "now there's a question on what a song is". Pharrell feels he's the one to blame for that. Watch below.