Looks like we've got another mystery on our hands.
What you need to do: Let's face it: there's nothing better than Scooby Doo. To dress up as this iconic bunch, you'll need to have each person copy their favourite character's look (double date!). Whoever dresses up as Shaggy needs to wear a green shirt and brown trousers, whoever chooses to be Velma needs to wear an orange shirt and a red skirt, Daphne should be wearing a purple dress with a green neck scarf, and Fred should plan on wearing a white shirt with light blue jeans and a small orange bowtie.