Pretty Serious is an Australian Indie polish brand, and I think that the three-piece Killer Fangirls collection was introduced in Halloween 2013.
Pretty Serious wanted to separate themselves from larger polish companies by making their various holiday collections available for people to buy for longer, and as this particular collection was inspired by the founder's (Kaz) love of horror movies and has proved so popular with customers, it's still in production today .and may even be extended in the future.
Today I'm finishing this collection by showing the most Halloweeny polish in it. Fitting because this polish was inspired by the film Halloween, and is named after the hometown of everyone's favourite homicidal stalker; Michael Myers...