Copy Olivia Wilde's mid-length loose curls, even in the summer

Many of us have tried to curl our hair perfectly in the summer months only to sadly watch it lose all its oomph as humidity got to it. Thanks to Moroccanoil Treatment Light and Moroccanoil Curl Control Mousse, Olivia's hairstylist, Mara Roszak, was able to ensure her curls would hold up in just about any condition. Mara told InStyle how she achieved the wavy curls: "I then used a curling iron to touch up her waves and define the texture, wrapping each section loosely around the barrel before letting it fall freely. After shaking the waves out with my fingers, I tucked her hair behind her ear on one side." She finished the look with Moroccanoil Luminous Hairspray to provide some sheen and to help set the style.

You can buy Moroccanoil Treatment Light ($43), Curl Control Mousse ($23.20) and Luminous Hairspray ($22.20) at moroccanoil.com