Mark guide lines on the cupcake base.
Sew them accordion style with a scant 1/8th inch seam.
First one side then flip it over and repeat in between each seam.
Trim your "cup" one edge pinked and the other straight.
Sew cupcake top to base (by hand).
Whip stitch the frosting in place after centering it onto your cupcake.
Brush on some Modge Podge and before it dries...
Sprinkle on some glass glitter!