Cream Cheese Pie

2 (8 ounce) packages cream cheese, softened
2 eggs
1 cup white sugar
1 teaspoon vanilla extract
1 cup sour cream
2 tablespoons white sugar
1/4 teaspoon vanilla extract
1 (9 inch) prepared graham cracker crust

Combine cream cheese, eggs, 1 cup sugar, and 1 teaspoon vanilla in the bowl of an electric mixer. Mix on low speed until smooth. Pour filling into graham cracker crust. Bake at 350 degrees F (175 degrees C) for 35 minutes. Remove pie from oven. Raise oven temperature to 450 degrees F (230 degrees C). In a small bowl, blend sour cream, 2 tablespoons sugar, and 1/4 teaspoon vanilla together. Gently spread mixture over pie. Bake for five minutes. Chill before serving.