Mix cream cheese, marshmallow fluff, sugar and peanut butter until smooth. Lay 2 long strips of plastic wrap in a criss cross pattern. Transfer cream cheese mixture to center of plastic wrap. Bring up all sides of plastic wrap, cover, tighten and gently form into a ball shape. Refrigerate 4+ hours or until firm.
Unwrap cheese ball, press chopped SNICKERS onto the bottom and place onto a platter. Gently press remaining SNICKERS onto cheese ball until completely covered. Refrigerate until served.