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16. Pepsi — “Britney Spears”
What’s the recipe for unprecedented ad success? Hire the world’s biggest pop star, wearing a Pepsi-brand outfit (plus belly button ring, natch), and give her a song and dance to a catchy jingle. Spears’ seminal 2001 Pepsi ad was more a full-scale music video than a commercial, sharp choreography included. It even featured a cheeky cameo from one-time presidential hopeful Bob Dole and heralded a new era of matching musical talent with mass-market products.