First and second image from http://www.etsy.com/shop/DolorisPetunia
Image from http://richesforrags.tumblr.com
WHAT YOU NEED:
The cheap ones didn't work. The ones I used are from Sally Hansen, Face Shop and Wet and Wild.
The only thing you have to do here is paint it the way you like it. You can experiment with colors or patterns and you're good to go. I'm not sure of is how long the color can stay but what I'm not definite about is that they're fab enough to compliment my outfits! :)