Legendary South African jazz musician, Hugh Masekela, who scored an unlikely No. 1 hit on the Billboard chart with his song “Grazing in the Grass” and who collaborated with artists ranging from Harry Belafonte to Paul Simon, has died at 78 after a protracted battle with prostate cancer, his family announced Tuesday. “[Our] hearts beat with profound loss,” the Masekela family said in a statement. “Hugh’s global and activist contribution to and participation in the areas of music, theatre, and the arts in general is contained in the minds and memory of millions across 6 continents.” Over his career, Masekela collaborated with an astonishing array of musicians, including Harry Belafonte, Herb Alpert, Bob Marley, Fela Kuti, Paul Simon — and his ex-wife, Miriam Makeba. For almost 30 years, “Bra Hugh,” as he was fondly known, was exiled from his native country. And almost despite himself — as he struggled for decades with copious drug and alcohol abuse — Masekela became a leading international voice against apartheid.