Lina Cavalieri (1874 - 1944) was an Italian opera singer known as the "world's most beautiful woman." Orphaned at the age of 15, she went to Paris where she took voice lessons, and made her opera debut in 1900. She married four times. After retiring from opera, Cavalieri ran a cosmetic salon in Paris, published a book, made motion pictures, and worked as a WWII volunteer nurse. She and her forth husband were killed during an Allied bombing raid in 1944.