Which product marketing campaign holds the Guinness World Record for 'Most comments on a Facebook post in 24 hours'?

Marketing campaigns can sometimes achieve extraordinary feats that earn them a place in the record books! From the largest product giveaways to the most viral social media campaigns, brands have pushed boundaries to make history. This trivia question focuses on a remarkable marketing achievement that secured its place in the Guinness World Records. Can you identify which campaign broke barriers and made history?

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Oreo's 'Dunk in the Dark' Super Bowl blackout post (2013)
Dove's 'Real Beauty Sketches' campaign (2013)
Samsung Mobile's 'SG III Comment To Win' campaign (2012)
Old Spice's 'The Man Your Man Could Smell Like' response videos (2010)