Now that it's October, you're probably already planning your Halloween costume.

Just kidding, you'll be scrambling to buy something crappy and over-priced at a crowded Halloween store at 6:00 P.M. on the night of Halloween, just like the rest of us.

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If you do feel like getting a jump on things, here are the two big costume trends this year. It's according to Pinterest though, so take that for what it's worth.

1. Group costumes. Instead of everyone doing their own thing, you pick an idea for a bunch of people, and everyone sticks to the theme. It can be anything Mario Kart, "The Walking Dead", whatever.

2. Throwback pop culture costumes. The '90s are hot, Pinterest says '90s costumes are 500% more popular than they were last year. Think boy bands, "Scream", the Spice Girls, "Clueless", "Ace Ventura", you get it.

Read more at Yahoo!