Which celebrity's 2018 endorsement deal resulted in a 31% sales increase for Adidas and helped revitalize the brand's position against competitors?

Celebrity endorsements have transformed retail marketing strategies and customer engagement. When famous personalities align with brands, they can dramatically influence purchasing decisions and shape consumer perceptions. This trivia question explores a notable case study of celebrity retail impact that changed an established brand's trajectory and demonstrated the power of strategic partnerships in the retail customer journey.

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Beyoncé with her Ivy Park collaboration
Kanye West with his Yeezy line
Rihanna with her Fenty collaboration
LeBron James with his signature shoe collection