I think the last thing I want to be reminded of while eating a cupcake (or muffin) is that it's contributing to a possible muffin top. But it's a unique idea anyway. Check out these muffin (or cupcake) top baking cups from Fred.
"Fill these adorable jean-style cupcake pants with your favorite cupcake batter. As Muffin Tops bake, they develop that little extra bulge around the middle! Eat up, it's just more to love."