That's purely freehand, I don't have any stencils or anything. So maybe not the neatest it could possibly be, but I love the look of it, both alone and as part of the full manicure. I love doing just one accent nail.
Also found another new OPI collection that I would give my firstborn child for:
Thanks to @AllLacqueredUp for the info - I think I'm still drooling. Damn I need a better-paying job so I can afford all of these! Looked up the nearest beauty supply store, and there's an Ulta in the shopping center down the road, so I'll definitely be heading that way soon. Let's hope my bank account survives.