Herbie Hancock, Stevie Wonder and Hugh Masekela starred at the finale concert for the first International Jazz Day in New York on Monday.
The music luminaries were joined by Hollywood giants including Michael Douglas, Morgan Freeman and Robert de Niro for the multinational attempt at the UN headquarters to put jazz back on a global par with rap and rock.
"What it has communicated to the world is incredible. It's the only language that is spoken by everyone all over the world," said South African trumpet player Masekela backstage at the gala concert which also featured Wynton Marsalis, Quincy Jones, Tony Bennett, 91-year-old Cuban percussionist Candido Camero and Chinese classical pianist Lang Lang.
International Jazz Day formally started on Friday with events and special concerts in more than 30 major cities around the world.
Marsalis, whose 78-year-old pianist father Ellis Marsalis played in New Orleans on Monday morning, said the event allowed musicians to come together as a community.
"Jazz musicians are everywhere. We all know each other," he said.
Lang Lang, who has made his name playing with the Vienna Philarmonic and other major global orchestras, said he wanted to help create a "new generation of jazz enthusiasts."
"For me, my focus is on classic, but I'm a big fan of Herbie Hancock," said the Chinese classical star.