The crossword solution for the term COMPOSER BERLIN, TO PALS is IRV. IRV is the acronym for Irving Berlin, an American composer and lyricist. He was one of the most prolific American songwriters in history, writing over 1, 500 songs, including the iconic 'White Christmas'. Berlin was born in Russia and immigrated to the United States as a child. He is best known for his Broadway musicals and Hollywood films, which have become classics.