Mr Livingstone today defended his decision to hold the festival, saying there was much to celebrate about Cuba - despite its criticism by human rights groups.
In his statement, Mr Livingstone said: "Despite the illegal and almost universally condemned blockade Cuba has achievements which are recognised by virtually the entire world.
"Life expectancy and infant mortality are at levels comparable to far more economically advanced countries. Cuban bio-science is among the most advanced in the world."
But have no fear. If all goes well, Red Ken will be replaced by an aging disc jockey.