The Andrews Sisters were an American close harmony singing group formed in 1937, consisting of sisters LaVerne, Maxene, and Patty Andrews. They became famous for their upbeat songs and tight vocal harmonies, contributing significantly to the popular music scene during the 1940s. Their style blended elements of jazz, pop, and big band music. The sisters gained immense popularity during World War II, performing for troops and recording hits like "Boogie Woogie Bugle Boy." Their music not only entertained but also boosted morale during challenging times. The Andrews Sisters left a lasting legacy in American music and influenced many artists who followed.