Turns Out, Supermodel Karen Elson Is a Master of Custom Cosmetics

  Perched on the edge of a marble tub at The Bowery Hotel, Karen Elson is slowly pouring a bottle of oil, letting the scent of red roses drift up from warm water. "It lingers on the skin," she says, explaining why the aromatic bath remains a treasured part of her pre-night out ritual--a rather meticulous routine she's here to dissect. "You smell really nice." As it turns out, the British supermodel is a master of makeup in her own right, having carefully honed her skills for years. "I was defin...