The two big costume trends this Halloween are group costumes, and throwback pop culture costumes from the '90s.

Now that it's October, you're probably already planning your Halloween costume...or... 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, just like the rest of us.

But if you feel like getting a jump on your costume this year, here are the two big costume trends this year, according to Pinterest.

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. For example, It can be anything from Mario Kart to the 'The Walking Dead', to the Kardashians.

2.  Throwback pop culture costumes.  And 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.

If you have some pictures of your costume from last year, upload them to the comments section. We need all the help we can get!