Wendy Clark, President of Coca-Cola North America's Sparkling Brands and Strategic Marketing, gave a masterclass on leadership at Cannes Lions. She discussed three of her most cherished principles: bravery, being underestimated, and belief. Bravery involves having a strong point of view and acting on it despite risks. Being underestimated lowers expectations and fuels competitiveness. Belief is a powerful tool when leaders inspire both individual and collective belief through humble confidence.