1 pkg. Betty Crocker yellow cake mix
1/3 c. butter, softened
1 egg

B:
2 (8 oz.) pkgs. cream cheese
2 eggs
3/4 c. sugar
1 tbsp. vanilla

C:
2 c. sour cream
1/4 c. sugar
1 tbsp. vanilla

D:
1 (21 oz.) can cherry pie filling

Heat oven to 350 degrees. Beat A ingredients in large bowl with mixer on low speed until crumbly. Pour lightly in ungreased oblong pan, 13 x 9 x 2 inch. Beat B ingredients until smooth and fluffy. Spread over cake mixture. Bake until set, 20 to 25 minutes. Mix C ingredients until smooth; spread over cheesecake. Cool. Spread pie filling over sour cream mixture and refrigerate at least 8 hours. Cover before refrigeration - I use aluminum foil.