As SM Entertainment prepares to bring its decades-spanning roster to London for SMTOWN LIVE IN LONDON at The O2 Arena on June 28, 2025, we’re tracing the moments that shaped its legacy as a K-pop powerhouse and blueprint builder for an entire industry. 

Welcome to the SM Legacy Series.

In early 2009, a wave of fluorescent colour, rigid synchronisation, and robotic cheerfulness swept across South Korea’s music scene. The song was “Gee.” The group was Girls’ Generation. And for SM Entertainment, this “first love story” wasn’t just a hit, but the moment its idol system snapped into focus — a case study in how brand, design, and digital distribution could fuse into pop strategy.

“Gee” marked the moment SM fully realised its vision for the scalable, brand-first idol group: a test case in pop product design, digital distribution, and long-tail content monetisation. The song didn’t just make SNSD into stars — it rewrote the company’s playbook.

Before “Gee,” SM had already seen success with first-gen girl groups (S.E.S), international expansion (BoA), and theatrical boy bands (TVXQ). But “Gee” was different. It wasn’t about innovation for innovation’s sake — it was about standardisation. This was the moment SM proved that it could take a rigorously engineered group, assign distinct member identities, pair them with a hook-driven track, and deliver a tightly unified concept that functioned like a consumer product. Cute wasn’t new. But “Gee” made it scalable.

The business result was historic. “Gee” spent a then-record nine weeks at #1 on Melon, swept nine consecutive #1 wins on Music Bank — the longest streak in the show’s history. So famous was the song that “Gee Syndrome” described a national phenomenon shaping how K-pop sounded and how youth dressed, danced, and self-identified. It became the most downloaded idol group song in South Korea, with 6.75 million pure sales worldwide, the highest for any girl group. SNSD weren’t just topping charts — they were everywhere, from variety shows to CFs to classroom dance covers. For SM, “Gee” became the blueprint for a new idol business model with cascading effects across the industry.

With “Gee”, SM perfected the idol group as long-term intellectual property, not just a music act. Each SNSD member was coded with a distinct persona — leader, cute one, cool one — reinforced through line distribution, screen time, choreography, and styling. “Gee” wasn’t just a song; it was a launchpad for nine marketable characters. That brand clarity allowed SM to expand SNSD into CFs, variety shows, merchandise, solo careers, and sub-units, generating multi-stream revenue without diluting identity.

While SM didn’t invent virality, “Gee” was its first major internet-native pop case study. The bright visuals, mannequin-pose choreography, and endlessly loopable “crab leg” dance were tailor-made for digital culture — from YouTube covers to GIFs and remixes. The track rode the early Korean Wave as online platforms eroded regional barriers. “Gee” gave SM its first taste of algorithmic spread, shaping its strategy: every comeback became both aesthetic artifact and distribution weapon.

“Gee” was a masterclass in brand coherence. From the mannequin shop set and colourful skinny jeans to pastel typography and visual rhythm, every detail served a unified aesthetic. SM’s “total concept” — where visuals, music, styling, and storyline form one inseparable whole — found its modern prototype here. Later groups like Red Velvet, NCT, and aespa inherited this structural logic: concepts executed as product ecosystems.

Until the late 2000s, boy groups were SM’s most bankable acts, especially in fandom-heavy models. “Gee” flipped that script. Its success proved girl groups could drive massive public recognition, brand partnerships, and national appeal. SNSD dominated endorsements, variety shows, and cross-generational visibility. “Gee” shifted SM’s calculus: girl groups became central to growth strategy.

With “Gee”, SM’s idol group model moved from aspirational ideal to replicable system. The framework was clear: debut a group with a values-forward intro (e.g. “Into the New World”), then land a breakout hit that locks in affection (“Gee”), then systematise via dense media saturation. The group became modular: extendable across sub-units, acting roles, overseas tours, and branded content. This structure powered future SM acts — f(x), Red Velvet, EXO, NCT, aespa — and shaped the industry’s approach to idol scalability.

In retrospect, “Gee” shaped SM’s 2010s vision. It proved pop idols could engineer public affection. It marked a turning point: groups became content ecosystems spanning TV, advertising, merchandise, and social media, not just vocal or dance acts.

Unlike many viral hits, “Gee” stuck. It remains a cultural touchstone: performed on survival shows, parodied on variety, referenced in politics. That longevity was deliberate. Built on repetition, iconic imagery, and maximal accessibility, it’s easy to imitate, impossible to forget. 

For SM, “Gee” is the crown jewel of its generation-defining hits. The same year, Super Junior’s “Sorry, Sorry” went viral across Asia, making 2009 a breakthrough year for digital K-pop and SM’s strategy of hits with longevity, replay value, and multi-market appeal. If BoA globalised the brand, TVXQ scaled spectacle, and Super Junior multiplied the format, “Gee” made the machine visible — a song that revealed the infrastructure behind success.

Most importantly, it lasted — not just in numbers, but in memory. It proved SM wasn’t just selling pop — it was building legacy through scalable idols, modular content, and the industrialisation of pop as product.