I love Washi tape, y'all. It's a pretty cute thing out there. Back at my birthday party we bought washi tape to write on for the glass cups, making preassigned drink-ware. Long story short it didn't come for the party so now we have a roll sitting in our craftroom. I used it.
Choose some washi tape and pick out two flat buttons.
Stick the button on the the tape.
Cut around the button.
Drop a spot of glue in the center and pour on some glitter. Let it dry (tip: it won't stay in a puffy round, the glue will flatten).
Use earring studs and hot-glue them to the back of the button. After it dries your earrings are ready to wear!