There have been several mentions of Rosie on Flint Expatriates and her performances of "Bill Bailey" in various Flint locales. Steve Hester, a producer and director at Zoom Digital Media in Grand Blanc, passed along this video of Rosie singing her signature tune.
"Rose Mary DeRosia was one of Flint's all-time great characters," Steve writes. "I taped this when I worked at Water Street Pavilion in downtown in 1988.
"Rosie, as she was universally known, had one true love in life: singing. Her theme song was 'Won't You Come Home, Bill Bailey,' and for years she would belt it out anyplace, anytime, especially if there was a band or a crowd nearby.
"Physically disabled and a survivor of 30 years in a mental institution, she was not homeless but spent much of her time on Flint streets, hitchhiking to get around.
Rosie got her moment in the limelight for her 68th birthday, in 1987, when 500 people came out to hear her sing — backed by some of Flint's top musicians — in a concert put on just for her at the Windmill Place.
"Rosie died March 18, 1990, after being hit by a car. Benefit concerts and fundraisers paid for a complete funeral and a headstone inscribed with the opening notes of 'Bill Bailey.'"