We love everything about this Halloween picture!

Not only did Fergie and hubby Josh Duhamel get all decked out for a trick or treating run with little Axl on Monday night, but mom and son totally coordinated with their costumes! Fergie dressed as a vintage Harley Quinn (complete with a baseball bat) while Axl dressed as the Joker. Josh was Mr. Incredible, so, not quite a comic book character and not a member of the Suicide Squad, but definitely in the right category.

Last week Fergie was snapped taking Axl to a Halloween party, and the celebritot was wearing a Spider-Man costume, so clearly he's got a thing for action characters...