Nothing Bundt Cakes' White Chocolate Raspberry Cake

pkg. white cake mix

(5 oz-ish) pkg. instant white chocolate pudding (or vanilla pudding if you can't find white chocolate)

sour cream

large eggs

water

oil

white chocolate chips, chopped into smaller pieces

raspberry pastry or pie filling (I used the "Solo" brand pastry/cake filling, but raspberry PIE filling works great too)

pkgs. cream cheese, softened

butter, softened

powdered sugar

vanilla extract