Before the rock & roll revolution, Rosemary Clooney was one of the most popular female singers in America, rising to superstardom during the golden age of adult pop. Like many of her peers in the so-called "girl singer" movement -- Doris Day, Kay Starr, Peggy Lee, Patti Page, et al. -- Clooney's style was grounded in jazz, particularly big-band swing. She wasn't an improviser or a technical virtuoso, and lacked the training to stand on an equal footing with the greatest true jazz singers.