The 12th annual Cape Town International Jazz Festival -- dubbed "Africa's Greatest Gathering" -- has just announced some of the American artists who'll be appearing this year. Dave Koz makes a return to the festival after his first trip there in 2009 with pal Jonathan Butler. Earth Wind and Fire will also be performing, along with rising star Esperanza Spalding. Promoters are also proud to announce the legendary saxophonist Wayne Shorter as a special guest. The Cape Town Festival takes place March 25-26.