Preheat oven to 400 degrees. On lightly floured surface, roll cookie dough into a circle about 12 inches in diameter and 1/8-inch thick.
Using nesting heart cookie cutters, cut 2 sizes small hearts, dipping cutter in flour before each use; sprinkle with colored sugars. Bake cookies on ungreased cookie sheet 6-7 minutes or until cookies are lightly browned. Cool cookies completely. Layer small and large cookies with icing between.
Reduce oven temperature to 350 degrees. Place Sweetheart Bandana baking cups in standard muffin pan. Prepare cake mix following package directions.
Fill cups 2/3 full; bake 17-19 minutes or until toothpick inserted in center comes out clean. Cool cupcakes completely. Ice cooled cupcakes with icing; insert cookies, mounding additional icing if necessary.
Convenience tip: Substitute Hearts Remembered Icing Decorations for cookies to top cupcakes.