When most of us want to accomplish a high-shine hair look, we turn to serum, glossing spray, or the like. But it turns out there's an even better strategy."Shine spray weighs the hair down," hairstylist Peter Savic told us. Which is why he used a totally different method to give Olivia Munn super-reflective locks at an event in Los Angeles this week. And we were completely surprised when Savic told us that the only product he used was — get this — hairspray.Instead of choosing a product that's formulated for shine, Savic opted for a smooth blowout, a pin-curl set, and a heavy amount of L'Oreal's Elnett Hairspray . First, he blew the actress' locks smooth; then, using a large-barrel iron, he created pin curls all over her head. "Alternate the direction of the curls," Savic instructs. Before pinning them to Munn's scalp, Savic gave each ring a heavy dose of hairspray.