Curly-haired women know: hydration is the key to achieving defined ringlets and waves. Let Moroccanoil's intensely conditioning and frizz-reducing Curl Defining Cream ($32) be your hair's secret weapon. While you can apply this product on wet hair with a diffuser, another way to use this argan oil-rich product is to refresh second-day strands. For thicker hair, try twirling it into individual curls after spritzing with water. And for waves, scrunch the cream in with your fingers, resetting your style with a diffuser. A little bit goes a long way with this cream, but if you use too much, spray hair with water to avoid a weighed-down finish. If you have a sensitive nose, this floral-scented cream might not be for you. But fragrance lovers will find that thanks to its high-sillage effects, this scented cream might even replace their perfume.