JERSEY FITNESS: Fans of the “Jersey Shore,” whose final season will premier Oct. 4, will be pumped to know that 25-year-old housemate Sammi “Sweetheart” Giancola has partnered with Hoboken, N.J.-based SXE Fitness to launch a 22-look fitness collection. “My goal was to design a fitness-wear line that spoke to how women want to feel when working out: stylish, sexy, comfortable and confident. It’s the perfect fit for women who want to have that extra edge when doing any type of fitness,” said Giancola. The line will be presented on Sept. 10 at Style360 at The Metropolitan Pavilion South.