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" is the quintessential falling star, that only lived for a short period of time but burned like a supernova," says poet Al Letson, presenter of this intriguing Radio 4 documentary - first broadcast in 2014, 18 years after his death. Exploring the complexity of Tupac's life and the battling identities that defined him, Al asks: what is it about Tupac's life that still resonates?

In 2014, just as was riding high with Happy, and a year after his monster-smash collaborations with (Get Lucky) and (Blurred Lines), looked back at the and man's distinguished career. The doc features interviews with, Thicke, and, of course, Pharrell himself.

Broadcast last year to mark 30 years of Def Jam records, explores how a musical form created on the streets of New York is making a huge impact in Africa. It's presented by Afua Hirsch and features a stellar cast of interviewees including Def Jam founder, Russell Simmons, as well as , 's Chuck D, and new stars , , and

On the remix of 's Diamonds From Sierra Leone, raps, "I'm not a businessman, I'm a business, man," and this fascinating documentary - first broadcast in 2006, when Jay still had a hyphen in his name - explores the very considerable commercial interests of this Brooklyn native. Much is revealed, such as his clothing company, Rocawear, making a staggering $90m in its first year.

In 2011, many people in the Middle East took to the streets to demand change. Revolution was in the air and, as with many revolutions, there was a soundtrack - hip hop. Four years after the start of the Arab Spring, music journalist Jackson Allers met local MCs to ask whether Arabic rap helped to make a difference, and also if political tensions have now divided what was once a united hip hop movement.