SEOUL, SOUTH KOREA - DECEMBER 24: South Korean singer PSY performs onstage during the 'All Night Stand 2015' on December 24, 2015 in Seoul, South Korea. (Photo by Han Myung-Gu/WireImage)
SEOUL, SOUTH KOREA - DECEMBER 24: South Korean singer PSY performs onstage during the 'All Night Stand 2015' on December 24, 2015 in Seoul, South Korea. (Photo by Han Myung-Gu/WireImage)