The Uncle Sam Jam celebration in Jefferson Parish will be bigger and better than ever featuring country music stars Lee Greenwood and Jana Kramer on July 3, 2014, at the Al Copeland Concert & Meadow Stage in Lafreniere Park, 3000 Downs Boulevard, Metairie. Local favorite Christian Serpas and Ghost Town will kick-off the free concerts. Uncle Sam Jam gates open at 4:00pm. The celebration is free and open to the public.