Which famous brand slogan was originally created as a temporary placeholder but tested so well with focus groups that the company kept it permanently?

Behind many iconic brand slogans are fascinating stories that reveal their true intent and creative process. Some were born from marketing genius, others from happy accidents, and a few from complete failures turned into successes. Test your knowledge of pop culture advertising history with this challenge about the origins of famous brand slogans that have become part of our cultural lexicon. Do you know the surprising truth behind these catchy phrases?

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Nike's "Just Do It" - Originally a line inspired by a death row inmate's last words
Apple's "Think Different" - Originally just filler text in a design mockup
McDonald's "I'm Lovin' It" - Originally just the backing track lyrics to a Justin Timberlake song
KFC's "Finger Lickin' Good" - Originally an accidental on-air remark during a live commercial