Medusa make-up?

yes match the snakes on your head with the ones for your face (colors) the one Drayvan was really cool with the paper and the one Atelier*Motives posted with the mask for the base would look cool. If it was me, I absolutely covet my Medusa Barbie and love how simple and gorgeous her looks are, I imagine she has fangs under those ruby red lips. I would invest in a pair of cat eyes contacts in your choice of color (yellow would be most stunning) and vampire fangs for snake teeth. A pic of the Medusa Barbie, you can see the makeup is very simple, and it looks alot like this video tutorial, I love this girl, lol. (not the one pictured at start but showing the how to, its much better than her inspiration on this makeup look IMO.
YouTube - Venetian princess Gorgeous golds inspired make up look

Great costume idea, first of all! Here are some general tips:

1. Elongate your eyebrows - pencil them in, or pencil over your actual eyebrows. By elongating, and angling the eyebrows up it gives you a sexy, evil look and changes your entire attitude.

2. Smokey eyes are a great fall back if you don't fall in love with any other ideas. It's simple to do, and always looks great. You can also start with smokey eyes and add on as you see fit. Greens and Reds are colors you're going to want to include in your makeup!

3. Liquid eyeliner will be your best friend. You can draw very sharp or very thick lines. It looks great. You can have so much fun with it, and it's super easy to take off or change if you mess up! It also comes in great fun colors - such as green or gray.

Okay, enough of that... here are some photos to help ya out. Enjoy!



Instead of blues you could definitely use greens and blacks.



You can create that sort of scaly look by using a variety of stencils - i've found that fishnets actually work great for create different patterns with makeup - just cut a piece out and put it on your face and either paint or draw into the circles, or use an airbrush if you have access to some hardcore makeup tools!



And finally this is a good look if you want to keep it simple and easy. Liquid eyeliner and diamond appliques work well. You could take this look and do a lot with it, too - add some red or green light eyeshadow underneath and around your eyes to look like a light mask, kinda like this:



Have fun and good luck!