Which pop star famously switched from endorsing Coca-Cola to becoming the global brand ambassador for Pepsi in 2012, reportedly signing a $50 million deal?

The world of celebrity product endorsements is worth billions and has created some iconic pairings that define pop culture. But sometimes stars switch allegiance from one brand to another, creating marketing drama behind the scenes. Test your knowledge about these high-profile endorsement changes that shook up the advertising world and made headlines.

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Beyoncé
Taylor Swift
Lady Gaga
Katy Perry