In a bowl, combine ice cream, butter and sugars. Pour into a greased 13x9x2inch baking dish. Arrange rolls in 36 rolls pieces. Cover and let rise in warm place until double, about 1 hour. Bake at 375* for 18-22 minutes or until golden brown. Cool for 2 minutes before inverting on a serving platter. Serve warm. makes 3 dozen.