Most Beloved
The single was KAT-TUN's first holiday-themed song to be released commercially, their second ballad to be released as a single since "Bokura no Machi de" in 2006 and their second consecutive single with no tie-ins to endorsements or television dramas. It is also the first KAT-TUN record to be released in South Korea, when it became available in stores on December 17, 2008. White X'mas is certified Platinum by RIAJ for shipment of 250,000 copies. In 2010, CDTV announced "Your Most Beloved Winter Songs of 2000s" ranking and White X'Mas topped the ranking.