Before Apple acquired Beats Electronics for $3 billion in 2014, what percentage of the company did Dr. Dre actually own at the time of the sale?

Celebrity endorsements have long been a staple of retail marketing, but some famous personalities take it a step further by creating their own product lines. These ventures can sometimes become more lucrative than their original claim to fame. One such remarkable retail success story revolutionized an entire product category and led to one of the largest acquisitions in Apple's history. Test your knowledge about this famous celebrity product development journey.

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75% (making him a billionaire overnight)
20% (earning him approximately $600 million)
25% (resulting in a roughly $750 million payout)
51% (as majority stakeholder, earning $1.5 billion)