Cream sugar and cream cheese together until smooth. Add eggs one at a time, beating after each addition. Mix in vanilla. Stir in three chopped candy bars and pour into baked crust.
4 Bake for 45 minutes or until knife inserted into center comes out sticky but not wet. Sprinkle remaining candy on top immediately after removing from oven. Let cool before removing springform sides. Chill at least 3 hours before serving. Better if refrigerated overnight.