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Cher Horowitz of ‘Clueless’

Cher Horowitz has been a Halloween favorite for 20 years now (yeah, we feel old too), but when the costume is this dead-on, we're happy to see it again.

16 Cool Halloween Costume Ideas to Shop Right Now

Less than a week left until Halloween — and you’re all set with the costume you’ve been carefully planning since August, right? Yeah, neither are we. But that doesn’t mean our only recourse is a running to the nearest Spirit store and grabbing a weirdly expensive, yet cheap-looking prefab costume. The truth is, you can probably build a much better Halloween costume, DIY style. Just grab a few items from your closet, throw in a just-for-Halloween buy or two, and voilà — a custom costume that looks way better than anything in cheapie polyester.

To prove it, we asked Polyvore to bring us its best user-generated Halloween sets. Ahead, you’ll find 16 cool costume ideas, that you can click to shop right on Polyvore. Trust us, there’s still plenty of time to look as if you put effort into Halloween (thank God for two-day shipping).

Channel the badass heroine of the Netflix original series that's not "Stranger Things" with this Jessica Jones costume.

Is it the most shockingly original costume ever? Definitely not. Do we adore this unusually elegant take on the cat costume – complete with slinky jumpsuit – anyway? For sure.