LE SSERAFIM, ILLIT and KATSEYE introduced the “ICONIC BY MISTAKE” stage on Mnet’s “M Countdown” before the digital single’s official release. The performance aired on June 11, 2026 as part of episode 932, with Mnet Plus listing ILLIT, KATSEYE and LE SSERAFIM as the cast for the stage. 1
The collaboration single was released on June 12, 2026 at 1 p.m. KST, following the broadcast debut. SOURCE MUSIC’s Weverse notice identified “ICONIC BY MISTAKE” as a special collaboration digital single and listed the U.S. timing as June 12 at 12 a.m. ET and June 11 at 9 p.m. PT. 2
ICONIC BY MISTAKE Stage Debuts on M Countdown

The first broadcast stage served as the main public performance introduction for the three-team project. NewsPim reported that SOURCE MUSIC, BELIFT LAB and HYBE x Geffen Records announced the collaboration through Weverse on June 8, with the first stage scheduled for Mnet’s “M Countdown” on June 11 and the digital single set for release on June 12 at 1 p.m. KST. 3
The performance brought together three HYBE-label girl groups in a single stage tied to one collaborative release. The project was also presented as more than a single-track release cycle. In press material carried by NewsPim, SOURCE MUSIC, BELIFT LAB and HYBE x Geffen Records said they planned to present “a high-quality performance stage as well as various content.” 3
Yonhap News Agency reported on June 12 that the three groups released “ICONIC BY MISTAKE” that day and that the first stage had aired on “M Countdown” the previous day. The report described the song as alternative pop, with a strong beat, irregular sounds and a hook built around the idea of becoming iconic by mistake. 4
| Item | Confirmed Detail |
|---|---|
| Collaboration title | “ICONIC BY MISTAKE” |
| Participating groups | LE SSERAFIM, ILLIT and KATSEYE |
| First stage | Mnet’s “M Countdown,” episode 932 |
| Broadcast date | June 11, 2026 |
| Digital single release | June 12, 2026 at 1 p.m. KST |
| U.S. timing listed by Weverse | June 12 at 12 a.m. ET; June 11 at 9 p.m. PT |
Release Timing and Official Framing
The release timeline was defined by official notices and Korean entertainment reports. NewsPim said the June 8 announcement was made through Weverse by SOURCE MUSIC, BELIFT LAB and HYBE x Geffen Records. 3 SOURCE MUSIC’s Weverse notice then provided the release schedule for Korea and the United States, confirming the June 12 release at 1 p.m. KST. 2
By June 12, the project had moved from announcement to broadcast performance and official single release. Yonhap identified the collaboration as involving the three HYBE-label girl groups and reported that the single was released on June 12. 4
The groups’ comments in press material focused on the meaning of working together. Yonhap carried brief remarks from each team, including LE SSERAFIM saying they were “really happy,” ILLIT calling it “a special opportunity,” and KATSEYE saying they had gained “sisterhood.” 4
Those remarks were attached to the release announcement rather than presented as extended interviews. The available reporting frames the project as a coordinated collaboration across the three groups, with the “M Countdown” stage acting as the first broadcast presentation before the digital single reached listeners.
Early Video Response
Korean outlets also reported early attention around the project’s video content after the performance and release. Edaily reported on June 12 that the project single was released at 1 p.m. after interest in the music video and performance stage. The outlet said the music video passed 10 million views in about 30 hours, while the “M Countdown” performance video exceeded 3 million views within half a day. 5
OSEN, carried by KoreaDaily, reported that the music video reached No. 1 on YouTube’s worldwide music video trending chart. The report also said it topped YouTube trending music in countries including the United States, the United Kingdom, Brazil and Iceland. 6

The available facts place the “ICONIC BY MISTAKE” stage at the center of the collaboration’s rollout: first on “M Countdown” on June 11, then through the June 12 digital single release, followed by early view-count and trending-chart results reported by Korean media. The stage remains the clearest source-backed focal point for how LE SSERAFIM, ILLIT and KATSEYE presented the joint project to the public.
References
- LE SSERAFIM, ILLIT, KATSEYE – ICONIC BY MISTAKE | Ep.932 | 260611 (Mnet Plus, 2026-06-11)
- [NOTICE] “ICONIC BY MISTAKE” Release (Weverse / SOURCE MUSIC)
- 르세라핌·아일릿·캣츠아이, 12일 '아이코닉 마이 미스테이크' 발매 (NewsPim, 2026-06-08)
- 르세라핌·아일릿·캣츠아이 뭉쳤다…"큰힘 주는 자매애 생겼다" (Yonhap News Agency, 2026-06-12)
- 세 팀, 하나의 무대… 르세라핌·아일릿·캣츠아이 시너지 폭발 (Edaily, 2026-06-12)
- 르세라핌·아일릿·캣츠아이, 모두가 기다린 만남.."서로에게 큰 힘과 영감" (OSEN / KoreaDaily, 2026-06-11)