"Crazy Party Night (Pumpkin no Gyakushū)" (Crazy Party Night ～ぱんぷきんの逆襲～, Kureijī Pātī Naito ~ Panpukin no Gyakushū ~, lit. "Crazy Party Night ~Pumpkin's Counterattack~") is the 11th single by Japanese model-singer Kyary Pamyu Pamyu, released on September 2, 2015. Releasing in both CD and digital editions, it is the first single recorded in 2015 as well as her second single release after Mondai Girl and contains songs tied into several commercials.

"Crazy Party Night (Pumpkin no Gyakushū)" is the theme song for Kyary's live tour in Japan, Crazy Party Night 2015.

"Crazy Party Night (Pumpkin no Gyakushū)" is Kyary's second release in 2015 following her previous single "Mondai Girl". With the song being Halloween themed, composer Yasutaka Nakata stated the song was inspired by Kyary’s love for fashion and dressing up and the title being a reference to the Japanese club culture of the '90s. Kyary’s new tour reimagines a crazy night experience, and offers fans a chance to enjoy Kyary’s music like dance music played at clubs. The song was later used as a promotional song for Coca-Cola Japan for their 2015 Halloween campaign.

Alongside the main song, it also includes other 3 songs composed by Nakata himself. These songs are used in several commercials: "No No No" for Ezaki Glico's Ice no Mi commercial, "Oshiete Dance Floor" for the Sharp Corporation's Aquos 4k LCD TV commercial in Japan and "Kimama" for the new Japanese commercial of Animal Crossing: New Leaf.

'Crazy Party Night (~Pumpkin no Gyakushū~)' starts off with a figure sitting in a rocking chair who turns on the TV. The channel is showing "news reporter Kyary" who is outside a house preparing herself for broadcast. She then introduces herself and then leads the crew inside. As reporter Kyary enters the house, she encounters many weird "cute ghosts," such as the Red Dog (he looks like a bear), the TV, the Robot, and the Cake-head ghosts, as well as a rainbow-colored zombie. The zombie notices her and lunges at news reporter Kyary and scares her, making her eyes pop out in a cartoonish manner. The zombie then tries to tackle her but she evades. Two zombies then chase her, so reporter Kyary tries escaping through a door as the chorus starts. As she enters the main room, reporter Kyary finds "ghost Kyary" is leading a dance of the cute ghosts, singing the chorus. There are additional ghosts there, such as the Candy-head and Pumpkin-head ghosts. Reporter Kyary is dancing to the song as the chorus finishes.

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Wikipedia