Thanks Barbie once again.
Get some PVA glue and put two blobs of it on cling flim-The size depends on what size you want your earring to be in the end.
Get some glitter and sprinkle some on the PVA.
You can use glitter glue instead and put two blobs of that on cling flim
Wait for it to dry and them stick the stud on with a little PVA.