Which iconic tagline was originally created as a temporary placeholder but became so popular that the company kept it permanently?

Marketing taglines can become cultural phenomena, sometimes outliving the campaigns that created them. But do you know which famous pop culture taglines have surprising or unusual origin stories? Test your knowledge of how some of the most recognizable brand phrases came to be, and discover the creative thinking behind these memorable marketing moments that shaped our cultural landscape.

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Nike's "Just Do It" - inspired by the last words of convicted murderer Gary Gilmore before his execution
Apple's "Think Different" - initially rejected by Steve Jobs but used in a presentation when the planned slogan wasn't ready
McDonald's "I'm Lovin' It" - repurposed from a Justin Timberlake song that was written before the campaign existed
M&M's "Melts in your mouth, not in your hands" - created by a summer intern who observed soldiers eating chocolate in hot weather