Which celebrity-brand partnership was the first to include equity instead of just a traditional endorsement fee, creating a business model that would influence celebrity deals for decades to come?

Celebrity endorsements have transformed product marketing strategies over decades. While many famous faces have lent their image to brands, some partnerships have been truly revolutionary in their impact on sales, brand perception, and marketing innovation. This question explores one of the most financially successful celebrity product partnerships in history and how it changed the celebrity endorsement landscape forever.

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Michael Jordan with Nike (Air Jordan)
50 Cent with Glacéau (Vitamin Water)
George Foreman with Salton Inc. (Foreman Grill)
Oprah Winfrey with Weight Watchers