CORTIS's 'REDRED' Just Became K-Pop's Second-Longest No. 1 Reign Ever — And a Sold-Out Tour Proves It Wasn't Luck
On August 1, 2026, roughly 50,000 people packed into Chicago's Grant Park for Lollapalooza and did something that usually happens for headliners with a decade of hits behind them: they sang every word back, in unison, to a group that had debuted less than a year earlier. CORTIS wasn't even the festival's biggest name on paper. But by the time they left the stage, it was obvious that "REDRED" — the song that had already spent months refusing to leave the top of Korea's charts — had turned into something bigger than a rookie hit. It had become a genuine chart record.
| Group | CORTIS — Martin, James, Juhoon, Seonghyeon, Keonho; under BigHit Music/HYBE; debuted August 18, 2025 with "What You Want" |
| Chart record | "REDRED" held No. 1 on Apple Music Korea's Daily Chart for 90 consecutive days as of July 24, 2026 — the second-longest reign ever, behind only BTS's "Dynamite" (112 days) |
| Global charts (as of Aug 5, 2026) | 14 consecutive weeks on Billboard Global 200 (No. 109) and Global Excl. U.S. (No. 63); album "GREENGREEN" logged 12 straight weeks on the Billboard 200 |
| Tour | First North American tour launched in Toronto on Aug 4, 2026 — all 14 shows across 9 cities sold out (through Aug 16), plus sold-out Korea/Japan dates |
| What's next | First-anniversary fan event "PUT YOUR PHONE DOWN Birthday Party," Aug 22-23 at Korea University's Hwajeong Gymnasium, Seoul |
Who Is CORTIS, and Why Is a Rookie Group Breaking Records Like This?
CORTIS is a five-member boy group — Martin, James, Juhoon, Seonghyeon, and Keonho — signed to BigHit Music, the HYBE label best known as BTS's home base. They debuted on August 18, 2025 with "What You Want," which means that by the time "REDRED" was setting chart records in the summer of 2026, the group hadn't even reached their first anniversary. That timeline matters: in an industry where most acts spend two or three years building toward a signature hit, CORTIS produced one inside their debut era, and it's still growing.
Inside "REDRED"'s 90-Day Reign
According to allkpop and STARNEWS, "REDRED" first reached No. 1 on Apple Music Korea's Daily Top 100 chart on April 26, 2026, and as of July 24 it had logged its 90th consecutive day at the top — making it the second-longest-reigning song in the chart's history. The only song that has ever stayed longer is BTS's "Dynamite," which held the top spot for 112 days back in 2020. It's worth being precise about what that comparison means: this isn't a "biggest song of the year" claim, it's a specific, measurable chart-longevity record on one specific platform, and as of this writing CORTIS was still extending it. Chart trackers and outlets sometimes report slightly different day counts depending on when they pull the data, so treat any specific number as accurate "as of" the date attached to it rather than a permanently fixed figure.
The song's reach goes beyond Korea, too. As of August 5, 2026, "REDRED" had spent 14 consecutive weeks on both the Billboard Global 200 (at No. 109) and the Billboard Global Excl. U.S. chart (at No. 63). Meanwhile the group's second mini-album, "GREENGREEN," had logged 12 consecutive weeks on the Billboard 200 — a run that outlets covering the K-pop chart beat have flagged as the longest of any K-pop boy group that debuted within the past five years.
A Sold-Out Tour Turns Streaming Numbers Into Proof
Chart positions can be abstract. Ticket sales aren't. CORTIS launched their first North American tour in Toronto on August 4, 2026, and every single show — all 14 dates across nine North American cities, running through August 16 — sold out. That sellout run sits alongside sold-out dates in Korea and Japan, meaning the group has now sold out its home markets, its neighboring market, and its first serious push into North America, all within roughly a year of debut. For a genre where "global popularity" often gets measured almost entirely through streaming and social numbers, a sold-out arena tour is the harder, more expensive metric to fake — venues have fixed capacity, and empty seats are visible in a way a streaming dip isn't.
Lollapalooza: The Moment It Became Undeniable
CORTIS's August 1 set at Lollapalooza Chicago is the clearest evidence of how fast their audience has grown outside Korea. Lollapalooza isn't a K-pop-specific festival — its lineup skews toward Western pop, hip-hop, and rock acts, and the crowd it draws isn't guaranteed to know every act on the bill. CORTIS playing to an estimated 50,000-person sing-along there, rather than at a K-pop-branded event like KCON, suggests "REDRED" has broken into a wider pop audience rather than staying inside the existing K-pop fanbase. That's a different (and harder) kind of crossover than what most fourth-generation groups have managed this early in their careers.
What's Next: A First Anniversary With a Pointed Theme
CORTIS is marking its one-year anniversary with a two-day fan event called "PUT YOUR PHONE DOWN Birthday Party," scheduled for August 22-23 at Korea University's Hwajeong Gymnasium in Seoul. The title reads almost like a wink at the group's own social-media-driven rise — a reminder, deliberate or not, that after a year defined by chart screenshots and streaming milestones, the anniversary event is framed around being present in the room rather than filming it.
Why This Run Matters for K-Pop's Next Generation
K-pop's "fourth generation" has produced plenty of commercially successful debuts, but a song holding a Korean chart's No. 1 spot for 90 days, an album charting on the Billboard 200 for 12 straight weeks, and a completely sold-out first international tour, all inside one debut-era cycle, is a different scale of outcome. It puts CORTIS in a small group of acts — alongside labelmates like BTS in an earlier era — whose debut-era numbers are being discussed in terms of all-time chart history rather than just "successful rookie" benchmarks. Whether CORTIS can sustain that with a second era remains the open question, but for now, the data and the ticket sales are telling the same story.
FAQ
How long did CORTIS's "REDRED" stay at No. 1?
As of July 24, 2026, "REDRED" had spent 90 consecutive days at No. 1 on Apple Music Korea's Daily Chart, the second-longest reign in the chart's history behind BTS's "Dynamite" (112 days). The song was reportedly still at No. 1 at that point, so the final total may end up higher.
Is CORTIS part of BTS's label?
Yes. CORTIS is signed to BigHit Music, the same HYBE-owned label that manages BTS, though the two groups are separate acts with different lineups and concepts.
Did CORTIS's North American tour actually sell out completely?
According to tour reporting as of early August 2026, all 14 scheduled shows across nine North American cities sold out, alongside sold-out dates in Korea and Japan.
When did CORTIS debut?
CORTIS debuted on August 18, 2025, with the single "What You Want." Their chart-record run with "REDRED" and sold-out tour both happened within their first year as a group.
What is the "PUT YOUR PHONE DOWN Birthday Party"?
It's CORTIS's first-anniversary fan event, scheduled for August 22-23, 2026, at Korea University's Hwajeong Gymnasium in Seoul.
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- How Big Is Hallyu in 2026? The Data Behind K-Culture's Global Boom
Written by the Hallyu101 editorial team, tracking K-pop chart and touring news as it develops. Chart-day counts and tour details reflect the most recent reporting available at time of writing and may be updated as CORTIS's run continues.
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