Yes, realizing that Halloween went away a couple of weeks ago, I still ended up listening to a part of the Halloween 2018 episode on Japan Top 10 today, and discovered Kyary Pamyu Pamyu's（きゃりーぱみゅぱみゅ）song "Crazy Party Night ~ Pumpkin no Gyakushuu". It's been translated as "Pumpkin's Counterattack" on Wikipedia and "The Pumpkin Strikes Back" for one YouTube video, but if I had to choose between the two, I would have to opt for that second choice.
Kyary Pamyu Pamyu's 11th single from September 2015, I should have figured out that the singer would do a Halloween-themed tune like "Crazy Party Night" since she's got the flair for cosplay, and what better holiday is there for cosplayers than on October 31st? The song was written and composed by Yasutaka Nakata（中田ヤスタカ）, and it is chock-filled with the flavour of a Disneyland spectacle and a Danny Elfman score.
Looking at the video, yep, to quote the lyrics from the original "The Addams Family" TV theme song, they're creepy and they're kooky, mysterious and spooky, they're altogether ooky...but at the same time, the strange characters don't look like bad sorts at all (well, maybe with the exception of that guy in the rocking chair). They wanna party like anyone else. I wonder if they would do private Halloween parties. "Crazy Party Night" peaked at No. 12 on Oricon.