Which celebrity endorsement deal is credited with transforming a niche athletic footwear line into a global phenomenon, eventually leading to a standalone brand worth billions?

Celebrity endorsements have become a cornerstone of modern marketing strategies. When a famous face attaches their name to a product, it can transform brand perception overnight. But not all celebrity partnerships yield the same results. This trivia question explores one of the most financially successful celebrity endorsement deals in history - a partnership that fundamentally changed both the product category and the celebrity's business empire.

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Michael Jordan's partnership with Nike (Air Jordan)
Rihanna's collaboration with Puma (Fenty)
Kanye West's deal with Adidas (Yeezy)
Serena Williams' endorsement of Nike (Serena Williams Collection)