Today, contemporary R&B is the music that the world spins to. R&B is one of the biggest selling music genres, worldwide its performers are among the most conspicuous celebrities on the planet with mighty corporations queuing up to recruit them to promote their products. This episode investigates how R&B arrived at its lofty heights. An extraordinary story unfolds, tracing the diamond-dripping, premiere-attending world of today's R&B stars, right back to the crack streets of Harlem in the mid 80s. It's also the story of how Mary J Blige's troubled journey revolutionised the sound of modern pop and in doing so took black music from the ghetto to fabulous.