His signature verdict on anything falling short of his exacting standards: À la poubelle. Straight to the bin, darling. A mediocre canapé? À la poubelle. An uninspired brand campaign? À la poubelle. The word authenticity, deployed lazily at a marketing conference? Absolument à la poubelle. 

Gstaad Guy has become a sought-after partner for the very brands he satirizes, most recently through a collaboration with Bentley. “People are buying the things I’m speaking about playfully, without me trying to sell them,” he said. “I was talking about the brands I work with today long before working with them. That’s where the authenticity comes in.” 

This authenticity has leant his commercial relationships credibility with Gstaad Guy’s 3.1 million Instagram and TikTok followers. “People assume that when you become more commercial, the content may lose that feel,” he added. “That actually never happened…it was quite the opposite.” 

Authenticity is a key consideration for consumers, with 97% saying it’s a key factor in deciding whether to support a brand and 81% reporting that they have stopped supporting a brand that no longer felt genuine, according to a 2026 Clutch report.  

“When a connection is authentic and real, it’s obvious to both parties,” Gstaad Guy said. “And when it’s artificial or forced, it’s equally obvious. The audience always knows.”  

Winning the crowd 

That tension is particularly visible in sport, where audiences are among the most invested and the least forgiving. Brands spend enormous sums trying to capture attention, yet sport is one of the few places where it is genuinely given rather than grudgingly captured. 

“Sport is the great unifier,” said Emily Ketchen, senior vice president and CMO of Lenovo’s Intelligent Devices Group. “Whether you support the same team or not, you can talk about it and have fun.” 

For Toby Craig, chief communications officer at Manchester United Football Club, the fans need to be treated as invested participants, rather than passive consumers. 

“They give us their time, they give us their passion, and they give us their commitment. And they expect the same back from us,” he said. “We want to have relationships where the brands who work with us activate in an authentic way.”  

Craig cited the club’s deal with Qualcomm’s computer chip and processor brand Snapdragon. It works, he said, because its devices are genuinely used to shoot Manchester United’s football content. The test, Craig said, is whether the partnership produces something real for fans rather than just decorating the shirt. 

“The idea isn’t just to slap on a logo and say, ‘presented by X,'” agreed Kraft Heinz’s North America CMO, Todd Kaplan. “It has to go beyond the logo.” Authentic brand moments, he argued, do not come from presence but from identity.  

That instinct produced the wonderfully eccentric Wienie 500, which sees six Oscar Mayer-branded “Wienermobiles” (27-foot hot dogs on wheels that have been rolling around American highways since 1936) racing full throttle around the Indianapolis Motor Speedway. Oscar Mayer is a subsidiary of Kraft Heinz that is best known for producing hot dogs and cold cut meats. 

Now in its second year, the race takes place on the same weekend as the Indianapolis 500—one of the biggest race days in U.S. sport—and ends with the winner being doused in mustard and handed the Borg-Wiener Trophy. Last year’s inaugural event drew 85,000 attendees and millions of livestreamers.  

“Someone had the idea of racing them at Indianapolis to mark the start of America’s grilling season,” Kaplan said. The Wienermobile has been part of American culture for 90 years, long before anyone thought to race one—and that history, Kaplan argued, is what makes the event feel authentic. 

Read more: ‘This is the least crazy AI is ever going to be’: The lessons Europe’s execs must take from Anthropic’s shutdown

“Live sports is the last great lean-in moment,” he said. “If you can find a way to organically, authentically connect, that is what we’ve been focusing on.” The best ideas, he added, come from unbriefed sessions where agency partners fire ideas at one another. “A lot of our best ideas are unbriefed ideas.” 

Why AI makes human creativity more valuable, not less 

AI is also changing the way marketers approach creativity and portray authenticity. More than three-quarters (78%) or marketers say they are concerned that increased AI use could reduce consumer trust in brands, according to a survey of 1,100 marketing and finance decision-makers across the U.S., U.K., and Canada, conducted by Fortune in partnership with Morning Consult. 

One-third (34%) believe AI will replace some creative functions and 19% think it will significantly reduce the need for human creativity altogether. 

Despite AI’s perceived threat to the creative function, Lucinda Barlow, head of international Marketing at Uber, believes the technology cannot replicate the human emotion, such as humor or entertainment, that is a requirement for the best campaigns. “Those feelings are really hard to replicate with AI,” she said.  

Zena Srivatsa Arnold, CMO at beauty company Sephora, added that marketers must remember there is always a “person behind the data.” Brands can use AI to analyze trends, she said, but they are ultimately selling to real people whose feelings and identities data cannot fully capture on its own. 

Timothy Young, CEO of marketing AI agent business Jasper AI, believes the greatest benefits of AI depend on the people using it. “You need somebody on your marketing team that really understands the human side to be a tastemaker and shift what the model is doing,” he said. “That’s where you can find the magic accelerator for your brand.”  

He added: “Authenticity is a function of trust over time.” The brands that chase every meme are the equivalent of the artist who sold out on their sophomore album. “We all know those artists. Their whole catalog tells the story.” 

Last year at the Cannes Lions festival, Barlow recalled that most panels celebrated AI, while the conversations offstage feared it. “People would get off the panel and immediately say, ‘Oh my god, I don’t think I’ll be here next year. I’m going to lose my job.'”  

However, this year, she said, the attitude towards AI was different. “What I’m feeling this time is a deep acknowledgment of the power of human creativity…that this is actually seen as a competitive advantage for your brand, for your business.”  

Regardless of what the technology can do, people’s judgment, so far, remains unchanged. Audiences cannot be fooled and the brands still trying to manufacture what can only be earned…well, à la poubelle. 

Stay up to date with our on-the-ground coverage from Cannes.