Well I had some felt, had dabbled with some fimo and made a skull using a tutorial by Mi.ezekatze. (she makes cool skull flowers) - I didnt have any fake flowers to make skull flowers, so I made some skull bows. Luvin the result!! Sorry for the lack of pix!!
Cut a square of black felt and using a needle and thread sew it together at the middle, to gather it.
Cut a small strip of black felt and wrap it around the middle of your bow, sew the back of the strip together, sew it on tight enough so you can slip your hair clip into it and it'll stay put.
Get a ball of white fimo and slightly flatten the back of it. Use the eraser of a pencil to make the eye sockets of the skull. Then use the tip to make the two nostrils.
Bake the fimo for 30mins at 110C. When done, cool then paint the eye sockets and nostrils with the black nail polish. When that's dry, coat it with varnish.
Glue your skull onto the middle of your felt bow and attach your hairclip to the back and you're done :)