Sweater, collared shirt (or just a collar if you have one around), 1/2 yard of sequined fabric, needle, thread and scissors
Begin by cutting around the collar as if to make a bib
Prepare a needle and thread. Tie a knot approximately 3 inches from the top of the sequined fabric. Fold the bottom of the fabric diagonally to make into a triangle-shaped end. Sew the fold so it stays in place.
From the inside, sew the collar into the sweater's neckline
Sew the extra 3 inches of fabric above the knot into the inside of the sweater's collar neck.