Jazz singers Frieda Lee (L), Spider Saloff (C) and Dee Alexander perform during Chicago Jazz Festival in Chicago, the United States, on Sept. 2, 2017. The 39th Chicago Jazz Festival, run by the city's Department of Cultural Affairs and Special Events, is held at various venues around Millennium Park from Aug. 31 to Sept 3, attracting dozens of jazz musicians from across the world and hundreds of thousands audience here accroding to the organizers. (Xinhua/Wang Ping)
