With just 10 days until the start of the FIFA World Cup, preparations continue at Lemon Hill in Philadelphia’s Fairmount Park for the city’s FIFA Fan Festival. Organizers announced that global Latin pop star Luis Fonsi will headline the festival’s opening night on Thursday, June 11. The performance is scheduled to take place after the day’s first match at 6 p.m. Crews have been working for nearly a week to transform more than 1 million square fe…