Which celebrity endorsement deal was reportedly worth $1 billion, making it the largest long-term athletic endorsement deal in history?

Celebrity endorsements can dramatically transform a brand's fortunes, but they come with hefty price tags. This poll explores the financial side of famous endorsement deals that changed product marketing history. Test your knowledge about which celebrities commanded the highest payouts for lending their name and image to major brands, and how these partnerships impacted sales and brand perception.

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LeBron James with Nike (lifetime deal signed in 2015)
Michael Jordan with Nike (Air Jordan partnership)
Cristiano Ronaldo with Nike (2016 contract)
Serena Williams with Puma (career-spanning partnership)