On Sunday, July 5, 2015, Troy “Trombone Shorty” Andrews and Orleans Avenue will arrive on the main stage at the Essence Music Festival as it celebrates its 20th anniversary. It, arguably, marks the first time a local artist has ever performed as a headliner in the big arena in the event’s two decades. Yes, New Orleans-born vocalist Ledisi played the festival’s arena, however, the Grammy-winning singe...