June was born as Shirley Luster on November 20, 1925 at the Memorial Hospital in Springfield, Illinois and was raised from the age of three in Decatur, Illinois; and from the beginning always wanted to sing.
She was singing with local bands when she was just 13, and later with society bands around Chicago, the big city 150 miles from Springfield, using the name Sharon Leslie. None of her family knew anything about music, so she had to persuade them to let her sing with the local home town band. The band was led by Bill Oetzel, and as Shirley Luster she sang with it for four years. Next she joined Boyd Raeburn's first great band at Chicago's new Band Box Theatre