To Make The Filling;
Beat cream cheese in bowl of electric mixer until smooth.
Add eggs, one at a time, beating well after each addition.
Add sugar, peanut butter and cream; mix until smooth.
Stir in vanilla, then fold in peanut butter cup pieces with a rubber spatula.
Pour filling into prepared crust.
Place springform pan into a larger baking pan.
Pour hot water into larger pan so that the water comes 1 inch up the sides of the spring form pan.
Bake at 275*F for 1-1/2 hours, or until firm and lightly browned.