Place a 9-inch spring form pan coated with cooking spray on a double thickness of heavy-duty foil (18-in. square). Securely warp foil around pan.
In a small bowl, combine graham cracker crumbs and confectioners' sugar; stir in butter. Press onto the bottom and 1 in. up the sides of prepared pan. Place on baking sheet. Bake at 325 F for 18-22 minutes or until lightly browned. Cool on a wire rack.
Place the lemon juice, vanilla, cottage cheese and 1 cup sour cream in a blender; cover and process for 2 minutes or until smooth.
In a large bowl, beat cream cheese and sugar until smooth. Beat in the remaining sour cream. Add flour and pureed cottage cheese mixture; mix well. Add eggs; beat on low speed just until combined. Pour into crust.
Place spring form in a larger baking pan; add 3/4 in. of hot water to larger pan. Bake at 325 F for 1-1/2 hours or until center is just set and top appears dull. Remove spring form pan from water bath. Cool on wire rack for 10 minutes.
Carefully run a knife around edge of pan to loosen; cool 1 hour longer. Refrigerate overnight. Remove sides of pan. Garnish with caramel topping and chopped candy.