Irving BERLIN was an American composer and lyricist who wrote the song 'White Christmas'. He was born in 1888 in Russia and immigrated to the United States with his family in 1893. BERLIN wrote hundreds of songs, many of which became popular hits, and he is widely considered one of the greatest songwriters in American history. His most famous song, 'White Christmas', was written in 1942 and has since become a holiday classic.