The Andrews Sisters were an American close harmony singing group active from the 1930s to the 1960s, consisting of sisters LaVerne, Maxene, and Patty Andrews. Known for their swing, boogie-woogie, and traditional pop music, they achieved significant success with over 90 million records sold worldwide. Their signature sound was characterized by tight harmonies and upbeat tempos, with notable hits including "Boogie Woogie Bugle Boy" and "Don't Sit Under the Apple Tree". The trio's influence is significant in music history, particularly in the swing and jazz era.