Preheat oven to 325°. Place a large roasting pan on the lower rack. Heat a kettle of hot water.
Spray 9" springform pan with nonstick spray and line the bottom with a round of parchment paper. Wrap a double layer of foil around the bottom and up the sides of the pan to seal completely.
Beat cream cheese until smooth. Mix in sugar and salt and mix 2 minutes. Add eggs one at a time, mixing well between each. Mix in the sour cream, whipping cream and vanilla until smooth.
Pour the batter in the pan. Set the pan in the roasting pan. Pour hot water into the roasting pan until it reaches 1 inch up the sides of the cheesecake pan.
Bake 45 minutes to 1 hour. Should be set to the touch and not jiggly. Remove from oven and cool on wire rack at least one hour.
When cooled, place pan in freezer and freeze completely. Several hours or overnight.