With her husky, plangent voice, blue-eyed soul queen Dusty Springfield channelled the exquisite ache at the heart of the sunniest songs, setting the tone for lovesick singers to come. Some, like Amy Winehouse and Shelby Lynne, find tension in spare, slow-burning arrangements; others, like Florence Welch and Alison Moyet, let anguish echo off the rafters. Each reveals beauty in an undercurrent of melancholy.