Once all sections of hair have been curled, Desir suggests brushing through it once with a large, wide comb. Of course, a generous helping of hairspray was necessary for Emily to survive all those Champére showers and impromptu Vespa rides around Paris, and Desir relied on Bumble and Bumble's Bb. Spray de Mode Hairspray (£25) to get the job done. Once your spray has been applied, voila — you're ready to selfie it up just like Emily Cooper.