The Power of Mismatch: How Incongruous Pairings Drive Ad Effectiveness
Ayden Kim — Westminster School, 995 Hopmeadow St, Simsbury, CT, 06070, United States
Juhyun Kim — St. Johnsbury Academy Jeju, 10, Global edu-ro 304beon-gil, Daejeong-eup, Seogwipo-si, Jeju-do, 63644, South Korea
Abstract
Traditionally, celebrity endorsements have relied upon the “Fit Hypothesis”, which assumes that there is a perfect match-up between a celebrity and a product. Ideally, this pair results in increased levels of trust and expertise, both in the celebrity and the product, thus increasing marketability and reliability. But recent “misfit” advertisements indicate a potential for an alternative path to successful advertising. In the following study, we will present findings from 32 participants who evaluated six real-world celebrity endorsement pairings using three fit metrics (expertise, image congruence, audience overlap) and three success metrics (brand recall, image improvement, interest change). Following this evaluation process, we asked participants to provide justifications to explain their ratings, which were thematically analyzed for results. It was expected that the celebrity endorsements with higher fit would receive better ratings, based on increased credibility, social proof, and the similarity between the celebrity and the product being advertised. While high-fit endorsements generally received the strongest ratings, not all low-fit endorsements performed poorly. One low-fit case, Shaq–Taco Bell, illustrates how emotional appeal and social proof may compensate for weak fit under certain conditions. Through a thematic analysis of 192 justifications, we identified five unique drivers that help explain both traditional and non-traditional success within the celebrity endorsement marketplace. Future utilizers of this market strategy may consider using this strategic incongruity in celebrity endorsements to call attention to products and create viral engagement, while establishing strong narratives that could sustain consumer interest.
Keywords
Keywords: Celebrity Endorsement; Fit Hypothesis; Strategic Incongruity; Value Congruence; Brand Recall; Purchase Intention; Social Proof
Introduction
Celebrity endorsements are usually judged by how closely a famous person fits the product. This study asks whether a deliberate mismatch can still make an advertisement work.
Conclusion
High-fit pairings generally received the strongest ratings, but a low-fit case such as Shaq and Taco Bell shows that emotion and social proof can offset a weak match. Strategic incongruity can draw attention when the story around the pairing is strong enough to hold interest.
How to Cite
Kim, Ayden; Kim, Juhyun. The Power of Mismatch: How Incongruous Pairings Drive Ad Effectiveness. Journal of Youth Impact. October 2026; 1(Issue 2). DOI: https://doi.org/10.66245/jyi.v1.i2.015