William Kalubi Mwamba (born 10 May 1992 in Kinshasa), better known by his stage name Damso, is a Belgian-Congolese rapper, singer, and songwriter. He is popular in France, where all of his albums were certified at least platinum.

Kalubi was born in Kinshasa, Zaire (present-day Democratic Republic of the Congo). When he was nine years old, he and his family left the country because of the bloody armed conflict and moved to Belgium. They eventually settled in Matonge, a largely Congolese neighborhood in Ixelles, Brussels. William's mother is Rose Marthe.