The BBC Banned the Monster Mash
Undoubtedly one of, if not the most well-known songs about monsters enjoying a party is 1962's Monster Mash. The song, which Bobby "Boris" Pickett recorded, is frequently played around the Halloween season and has appeared in numerous cartoons and motion pictures throughout the years. It's a song about a mad scientist who invents a new dance fad for monsters like Dracula and the Wolfman, quite literally. Overall, it's rather innocent material, but tell that to the BBC in the UK.
Because it was too morbid, Monster Mash was banned from UK radio for 11 years. It reached number three in the charts in 1973 when they let the monster-living populace to hear it for the first time. The criteria for what was deemed excessively morbid were not specified, but considering lyrics like "The undead were having fun (tennis shoe, wa-ooo)," one can only speculate.