Fresh jasmine has a heady, beautiful scent, which is why the flowers are so valued in the fragrance world. Chanel uses jasmine in Chanel N°5, and the raw floral oil sells for more than $120 an ounce. In other words, it's luxurious stuff — which is why the idea of having jasmine-scented hair feels incomparably fancy. Earlier this week, designer Rachel Roy did just that at the Met Gala, wearing Kesari Indian Oil hair serum ($26.50) in her hair. The newly launched serum is incredibly lightweight, stops frizz, and adds shine when applied before or after a blow-dry. Those are all worthy qualities, but the reason I keep applying it is the scent. Imagine a dozen freshly plucked jasmine flowers sitting in the sun, softly releasing their fragrance. That's exactly it, and that's why this jasmine aficionado will probably finish her bottle by the end of next week.