White Christmas (song) are the formats and track listings of single releases of "White Christmas". Crosby's "White Christmas" single has been credited with selling 50 million copies, the most by any release and therefore it is the biggest-selling single worldwide of all time. The "Guinness Book of World Records" 2009 Edition lists the song as a 100-million seller, encompassing all versions of the song, including albums. Crosby's holiday collection "Merry Christmas" was first released as an LP in 1949, and has never been out of print since. There has been confusion and debate on whether Crosby's record is or is not the best-selling
Christmas Time Is in the Air Again tempo of 50 beats per minute; Carey's voice spans just short of two octaves from F♯ to E. On November 26, 2012, Carey announced via her Twitter account that "Christmas Time Is in the Air Again" would be released as a promotional single. "The Village Voice" writer Rich Juzwiak felt that "Christmas Time Is in the Air Again" was the only song on "Merry Christmas II You" that matched "the magic" of her 1994 single "All I Want for Christmas Is You", describing it as "exquisite". He continued to write that it is "a sweeping big-band ballad that you'd swear