Which celebrity partnership led to a dramatic 30% increase in younger customers (18-29) for a previously aging brand, with their signature product line generating over $1 billion in sales?

Celebrity endorsements have become a cornerstone of modern marketing strategies, often transforming ordinary products into must-have items. These partnerships can dramatically shift consumer demographics, reposition brands, and create cultural phenomena. This trivia question explores one of the most successful celebrity-brand partnerships in recent history and the surprising impact it had on the company's customer demographics.

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Rihanna's Fenty Beauty with LVMH
Beyoncé's Ivy Park with Adidas
George Clooney's Casamigos Tequila
Dwayne 'The Rock' Johnson's Project Rock with Under Armour