LOS ANGELES - OCTOBER 31: Mike Tyson poses at the Halloween Mansion Party hosted by Haylie Duff on October 31, 2005 in Hollywood, Los Angeles, California. (Photo by David Livingston/Getty Images)
Women dressed as nuns pose for pictures during Halloween celebrations in the Shibuya district in Tokyo, Japan October 31, 2015. (Photo by Thomas Peter/Reuters)
Women in costumes walk as they participate in Halloween celebrations in the downtown of Seoul, South Korea, October 31, 2015. (Photo by Kim Hong-Ji/Reuters)