The spaghetti-strap tank top is a classic piece. It’s more pared back than the silk, lace-trimmed club top but more formfitting than the supermodel-favored cheap white tank.

With a heatwave underway, look to Kate Moss, Gwyneth Paltrow and Lily-Rose Depp for a Calvin Klein-inspired dose of minimalism. Enter the answer to warm-weather dressing dilemmas: the spaghetti strap ...