Just for anyone who is curious, here is a description I wrote on tumblr of how I did Muffet's extra eyes. Hopefully I'll have a proper tutorial for you someday, but I hope this helps for now. ^_^
http://emrisdrake.tumblr.com/post/132893166632/hi-i-w...
I'm loving your Undertale Cosplay makeup tests. They both look fantastic! The rest of your gallery is lovely as well. Can't wait to see your next Cosplays!