with the album announcement on May 18, Kyary also announced that she would be holding an arena tour after her hall tour in Japan. Both nationwide tours were held after the Nanda Collection World Tour. The Hall tour consisted of 17 shows in 13 cities, visiting Saitama, Tokyo, Miyagi, Matsudo, Hokkaido, Tochigi, Niigata, Ishikawa, Yamanashi, Chiba, Hiroshima, Kagawa, and Aichi, and lasting from July 27 until September 22. The arena tour consisted of nine shows in five cities, which ran from October 18 to November 9, visiting the cities of Makuhari, Osaka, Nagoya, Fukuoka, and Yoyogi. 2015–2016: KPP Best In January 2015, she was mentioned by The Hollywood Reporter as one of the "major recent sellers" for Warner Music Group alongside artists including Coldplay and Ed Sheeran. In March 2015, Kyary Pamyu Pamyu released her single "Mondai Girl". In June, she was chosen by the international cosmetic brand MAC Cosmetics as one of its "Global Heroes" and was profiled in an interview on their website. In the following month, Kyary was chosen to represent Japan in Italy at Expo 2015. On June 17, 2015, a remake of the movie Nutcracker Fantasy with a remix of her song "Oyasumi" as the theme song. On September 2, 2015, Kyary released the Halloween-themed single "Crazy Party Night (Pumpkin no Gyakushū)" and began the Crazy Party Night 2015 Tour, a nationwide concert tour that lasted until December 2015. The music video for the single premiered beforehand on August 20, 2016 and has since amassed over thirteen million views as of May 2018. On October 11, 2015, she played a one-off international concert at The Roundhouse in London, England. In November 2015, Kyary was featured prominently in advertising for "The World Goes Pop" exhibition at the Tate Modern national art gallery in London. On May 25, 2016, her debut compilation album KPP Best was released, featuring her single "Sai & Co" which was released on April 20. Around that time, Kyary Pamyu Pamyu announced a third world tour titled the Five Years Monster World Tour. The world tour visited Singapore, London, Sydney, Melbourne, San Francisco, New York City, Taipei, and Tokyo. Her first art exhibition titled the Kyary Pamyu Pamyu Artwork Exhibition 2011–2016 was held at Laforet Harajuku from December 16. In addition to every CD jacket design being present at the event, over 100 images were displayed, including photos from Kyary's photobooks that were