345B: Musical Love Story from Harlequin Era

I'm looking for a book which may be Harlequin from late 1970s or early 1980s, about a young widow of a rock and roll band member who may have committed suicide. She falls for his band mate, who has long been in love with her, and it turns out, she has a hidden singing talent. I believe the setting is at a beach house, in Florida perhaps.