Only the coolest take to the stage at this Halloween-themed festival in City Park, known for its blending of high-profile national artists such as Marilyn Manson, 50 Cent, Red Hot Chili Peppers, Duran Duran, Nine Inch Nails, R.E.M. and 311, with local Louisiana musicians including The Original Meters, Trombone Shorty and Orleans Avenue, and Dr. John.