If you need a reminder of some of the best pop star costumes of 2021, take a look at Billboard's roundup here.
Some highlights include Harry Styles hitting the Madison Square Garden stage for "Harryween" dressed as Dorothy from The Wizard of Oz, complete with ruby slippers.
Then there were Travis Barker and Kourtney Kardashian's multiple costumes, including ill-fated punk couple Sid and Nancy as well as Alabama and Clarence from True Romance.
Lil Nas X went with a few costumes too: Harry Potter baddie Voldemort and Seth Powers from Ned's Declassified School Survival Guide.
That's just the tip of the Halloween iceberg. Revisit some Halloween highlights here, and then vote in our poll below.
Who had the best 2021 Halloween costume?