In 1930, Rosemary performed on stage as part of the entertainment accompanying the release of her sister Lola's Hollywood movie Good News.

Rosemary, a member of the National Honor Society, graduated from Indianola High in 1931 and attended Simpson College for a while, playing on the freshman basketball team.

Fred Waring, an orchestra leader, heard Rosemary and Priscilla singing, and contracted the Lane sisters to join his band, The Pennsylvanians.

[6][7] Lane's next film was the musical Hollywood Hotel, in which she co-starred with sister Lola, and Powell, before starring in Gold Diggers in Paris, opposite Rudy Vallee.

[15] Lane died of diabetes and pulmonary obstruction at Motion Picture Country Hospital on November 25, 1974, in Woodland Hills, California at the age of 61.