Which celebrity's 2007 collaboration with Procter & Gamble's CoverGirl became one of the most successful in beauty retail history, lasting 14 years and helping transform her from a singer to a business mogul?

Celebrity brand collaborations have become a cornerstone of retail marketing strategy, creating powerful synergies between personal brand equity and product appeal. Some collaborations have been so successful they've transformed both the celebrity's career trajectory and the brand's market position. This poll tests your knowledge about a groundbreaking celebrity partnership that redefined what brand collaborations could achieve in retail.

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Taylor Swift
Beyoncé
Queen Latifah
Ellen DeGeneres