Gap CEO says its viral denim campaign wasn't just a hit online — it drove double-digit growth in sales, fueled by Gen Z Business InsiderGap comparable sales surge after viral 'Milkshake' denim ad with Katseye CNBCGap Raises Fiscal-Year Outlook on Growing Demand Across Income Levels The Wall Street JournalGap Wins Over Cautious Shoppers With Partnerships, Celebrities Bloomberg.com