In a small bowl, combine cookie crumbs and butter; press onto the bottom of a 9-in. springform pan coated with cooking spray. Bake at 325° for 6-8 minutes. Cool on a wire rack., In a large bowl, beat cream cheese until smooth; beat in sweetened condensed milk. Add eggs; beat on low speed just until blended. Beat in vanilla just until blended. In a small bowl, toss 1/3 cup chocolate chips and flour; stir into batter. , Pour into prepared pan. Sprinkle with remaining chocolate chips. Bake at 325° for 30-35 minutes or until almost set. Carefully run a knife around edge of pan to loosen; cool on a wire rack for 1 hour. Cover and refrigerate overnight. Remove sides of pan. Refrigerate leftovers.