If you're not sure the best Halloween costume to rock at this year's costume party, it's true that power comes in numbers! People appreciate a good group Halloween costume, and even more importantly, the group effort makes for the best memories. We rounded up the best group Halloween costume ideas, whether you're just teaming up with a couple of friends or you want to get a huge group to all go in.

Some group costumes can be tough to put together because they nearly require the right number of folks. Fortunately, the crew of the Mystery Machine has solved this problem, too! Team up as the Scooby Squad, since they're always splitting up in teams. While Scooby and Shaggy are off getting into trouble, Velma, Fred, and Daphne are great for a group of 3 Halloween costumes! When it's time to finish the episode, bring everyone together and unmask that ghost!

What are popular group Halloween costumes 2019

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