Preheat oven 350°F. Spray Fancy Fill pans from set with vegetable cooking spray.
In medium bowl, combine flour, baking soda, baking powder and salt; set aside. In large bowl, beat butter and sugar with electric mixer until light and fluffy. Add eggs, vanilla and mashed banana; mix well. Add flour mixture alternately with sour cream; blend thoroughly but do not overmix. Pour into prepared pans.
Bake 33-38 minutes or until toothpick inserted in center of cake comes out clean Cool 10 minutes in pan on rack; remove from pan and cool completely.
Prepare icing mix according to package directions. Ice top and sides of cake; freeze at least 2 hours or until ready to serve. Garnish with strawberries and star pics.