Gnawa music is a Moroccan spiritual musical tradition developed by descendants of enslaved people from Sub-Saharan Africa. It combines ritual poetry with traditional music and dance, and is traditionally only performed by men. But one female Moroccan artist, Asmâa Hamzaoui, has broken the mould. She's become an international star, who has even performed for Madonna on her birthday. For Assignment, reporter Myriam Francois travels to Casablanca to meet Asmaa and her family, and follows her to the Essaouira Festival, the annual celebration of Gnawa culture. What does its ever-growing popularity tell us about the changing identity of a country that once saw itself primarily as part of the Arab world, but has now become more interested in its links to the rest of the African continent? Presented by Myriam Francois Produced by Tim Whewell Series editor Penny Murphy (Image: Asmâa Hamzaoui. Credit: BBC/Myriam Francois)