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
What Is Life the first ex-Beatle to have two top-ten hits in the United States.<ref name="Mapes/Billboard">Jillian Mapes, "George Harrison's 10 Biggest Billboard Hits", billboard.com, 29 November 2011 (retrieved 4 June 2014).</ref> The single was a success internationally, climbing to number 1 in Switzerland and on Australia's "Go-Set" National Top 60, and reaching the top three elsewhere in Europe and in Canada.<ref name="Tsosrt/GH singles">"George Harrison (Song artist 225)", Tsort pages (retrieved 16 October 2012).</ref> In Britain, where Harrison had resisted issuing a single from "All Things Must Pass" until midway through January, "What Is Life" appeared on the B-side to "My Sweet Lord" –