All three sisters were born and raised in the Minneapolis area.
Listening to the Boswell Sisters on radio, LaVerne played the piano and taught her sisters to sing in harmony; neither Maxene nor Patty ever learned to read music. All three studied singers at the vaudeville house near their father's restaurant. As their skills developed, they moved from amateur shows to vaudeville and singing with bands.
After Peter Andrews moved the family to New York in 1937, his wife, Olga, sought singing dates for the girls. They were often turned down with comments such as: "They sing too loud and they move too much." Olga persisted, and the sisters sang on radio with a hotel band at $15 a week. The broadcasts landed them a contract with Decca Records.
They recorded a few songs, and then came "Bei Mir Bist Du Schoen," an old Yiddish song for which Sammy Cahn and Saul Kaplan wrote English lyrics. (The title means, "To Me You Are Beautiful.") It was a smash hit, and the Andrews Sisters were launched into the bigtime.
In 1947, Patty married Martin Melcher, an agent who represented the sisters as well as Doris Day, then at the beginning of her film career. Patty divorced Melcher in 1949 and soon he became Day's husband, manager and producer.
Patty married Walter Weschler, pianist for the sisters, in 1952. He became their manager and demanded more pay for himself and for Patty. The two other sisters rebelled, and their differences with Patty became public. Lawsuits were filed between the two camps.
Patty Andrews is survived by her foster daughter, Pam DuBois, a niece and several cousins. Weschler died in 2010.