In second medium bowl, mix cream cheese, sour cream, sugar, and vanilla extract until creamy and soft peaks start to form. Set aside.
6 In chilled bowl, beat whipping cream until about doubled in size and peaks begin to form, then mix in powdered sugar just until combined.
7 Gently fold cream cheese mixture into whipped cream until smooth. Spread into graham crust.
8 Spread berry topping over cheesecake. Chill for 4-6 hours or until set.