If the recent runway shows from New York to Paris weren’t enough to convince you that slick, still-damp hair is an entirely appropriate Saturday-night beauty statement, you need only to look at Diana Ross on the cover of her 1980 album, Diana. Her signature more-is-more cloud of curls has been replaced with a cool, freshly washed bob that reveals the high-gloss shine of a hydrating hair oil. On her face, the former Supremes front woman (and the girl group’s makeup artist and hairstylist) eschewed her high-wattage glamour for the flattering nonchalance of slept-in eyeliner and softly shaded cheekbones. It’s a timeless look that’s just as well suited for a night out in a lingerie-inspired black slipdress as it is for a white T-shirt and jeans. Simply forgo the blowdryer and get lost in your primping sound track—“I’m Coming Out” would be an appropriate choice.