Oumou Sangare was among stars honoured at the Aga Khan Music awards in Portugal. The awards celebrate Muslim musical heritage. Some of Africa's top artists, from Oumou Sangare to Ballake Sissoko were recognised for their work at the ceremony which was held in Lisbon, Portugal. Oumou Sangare, from Mali, says: "I have the responsibility to increase my efforts to continue to safeguard the tradition, and to always be the guardian of the traditional music of Wassoulou, of Mali in general and of Africa."