Which of these famous advertising slogans was officially added to the Oxford English Dictionary as a recognized phrase or term?

Throughout history, clever advertising slogans have not only sold products but also enriched our language. Many phrases that began as marketing taglines have transcended their commercial origins to become part of everyday vocabulary. This poll tests your knowledge about the linguistic impact of memorable brand messaging and how certain advertising phrases have evolved from product promotion to cultural lexicon. Can you identify which famous slogan actually entered mainstream language dictionaries?

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'Where's the beef?' (Wendy's, 1984)
'Just do it' (Nike, 1988)
'Google it' (derived from Google's brand name)
'I'm lovin' it' (McDonald's, 2003)