Cherries n Cream Cakes

1 pk Cherry chip cake mix
1 c Sour cream
2 tb Sugar
1/2 ts Vanilla
21 oz Cherry pie filling

Heat oven to 350. Prepare and bake cake in 2 round pans as directed on package. Cool 10 minutes; remove from pans. Cool cake completely. Mix sour cream, sugar and vanilla. Spread over top of cakes. Spoon pie filling over sour cream mixture. Store cakes in refrigerator.