Years of highlighting and heat styling can leave even the most formerly lustrous tresses looking dull, fried, and frazzled. But don't take my word for it--just listen to Frederic Fekkai: "The number-one question I hear from clients is how to keep their locks looking shiny and healthy." In response, the hair guru recently mixed up Glossing Sheer Shine Mist ($22.50; sephora.com), an ultra-lightweight hydrating spray that just might be the answer to your high-sheen prayers. Like the brand's ever-popular Glossing Cream, the mist is infused with pure olive oil and potent emollients. But this time, the glossy finish is even more weightless and easy to apply (just spritz a light, even layer on dry hair post-styling, and you're done). The results? On a recent test run, it rendered my fine strands soft, silky, and manageable without weighing them down. --Jamie Stone