All you need is fabric glue and scissors and an old CD you don't want
Cut your CD into pieces like on the picture to the side and fabric glue it to the collar of your shirt with the shiny side up! Let dry overnight.
all Images are from Google search.
for this one you will be needing any kind of rhinestone or just little decorations with a flat side and you just fabric glue the flat side on the collar in any order you want! Let dry overnight.
take as many or little pearl buttons as you want and you just hand sew them to your collar, you may have to look up how to sew on the button if you have any trouble. GLUE WILL NOT WORK.
For this collar you will need sequin fabric and either fabric glue or a sewing machine.
Either you sew the sequin fabric on the collar or you cover the back of the fabric in fabric glue and carefully spread it evenly onto the shirt collar. Let it dry for AT LEAST 24 hours, I'm not even sure if that is long enough.