Which celebrity became the first billionaire athlete primarily through their retail brand partnership rather than their sports earnings?

Many celebrities have ventured beyond their primary careers to become the face of major brands or even develop their own product lines. This trivia tests your knowledge about the strategic marketing partnerships between famous personalities and retail brands. How well do you know which celebrities have become iconic brand representatives or created successful retail empires?

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Michael Jordan with Nike's Air Jordan
LeBron James with Nike's LeBron line
Tiger Woods with Nike Golf
Serena Williams with Nike Court