Ghostwriter: Is it OK to get help writing songs?

Using a ghostwriter is basically a sin in the rap world - but it's something Drake, Jay-Z and Kanye West have all been accused of. "So many rappers work with writers and it's such a blurred line now with people doing the melodic stuff as well", British rapper Ms Banks tells BBC. There's also high-level camps where some of the biggest artists, producers and songwriters working in rap right now come together for a couple of days with one ultimate aim - to create as many hits as possible.