"Blue Valentine" is a song recorded by South Korean girl group Nmixx for their debut studio album of the same name. It was released as the album's lead single by JYP Entertainment and Republic Records on October 13, 2025. The song garnered ten wins on South Korean music programs and topped the Circle Digital Chart.
Background and release On September 15, 2025, it was announced that Nmixx would be releasing their first studio album titled Blue Valentine on October 13. On September 24, upon the reveal of the album tracklist, "Blue Valentine" was confirmed to be the album's lead single. Previews of the song were released through the a cappella and original highlight medley videos on October 8 and 10 respectively. On October 12, the music video teaser for the song was released . The song was released alongside its music video on October 13, upon the release of the studio album. The Mixx version was released on October 17, which includes the English and a cappella versions of the song.
Composition "Blue Valentine" was written by J14 (Full8loom), Youra (Full8loom), Danke, Kook Ji-won (Jamfactory), Moon Seol-li, Jellybean (153/Joombas), Milena, and Seora, and composed by Kass, Sevn Dayz, and Stalking Gia. The song is described as "a blend of melancholy synth sounds, guitar riffs and boom bap rhythms at different speeds", showcasing the group's signature, trendy take on the "Mixxpop" genre that fuses more than two musical styles into a single track. It has also been described as a pop rock song.
Promotion Nmixx performed "Blue Valentine" on four music programs in the first week of promotion: Mnet's M Countdown on October 16, KBS's Music Bank on October 17, MBC's Show! Music Core on October 18, and SBS's Inkigayo on October 19. In the second week of promotion, they performed on five music programs: MBC M's Show Champion on October 22, M Countdown on October 23, Music Bank on October 24, Show! Music Core on October 25, and Inkigayo on October 26, where they won first place in all appearances.
Track listing Digital download and streaming – Mixx Version "Blue Valentine" – 3:06 "Blue Valentine" (English version) – 3:06 "Blue Valentine" (A capella version) – 3:06 "Blue Valentine" (Sped up version) – 2:30 "Blue Valentine" (Instrumental) – 3:06
Credits and personnel Credits adapted from Melon.
Studio JYPE Studios – recording, mixing Glab Studios – mixing for Dolby Atmos 821 Sound Mastering – mastering
Personnel
Nmixx – vocals Lily – background vocals; lyrics Haewon – background vocals Jiwoo – background vocals Kyujin – background vocals J14 (Full8loom) – lyrics Youra (Full8loom) – lyrics Danke – lyrics Kook Ji-won (Jamfactory) – lyrics Moon Seol-li – lyrics Jellybean (153/Joombas) – lyrics Milena – lyrics Seora – lyrics Sophia Pae – lyrics Kass – composition, arrangement, computer programming, various instruments Sevn Dayz – composition Stalking Gia – composition Lee Hae‑sol - arrangement, computer programming, electric guitar C'SA – vocal directing, vocal editing Lee Chang‑hoon – recording Kim Gap‑soo – recording Uhm Se-hee – recording Lee Tae‑seob – mixing Shin Bong-won – mixing Park Nam-joon – mixing (assistant) Kwon Nam-woo – mastering
Charts
Weekly charts + Chart (2025–2026) Peakposition Global 200 (Billboard) 59 Hong Kong (Billboard) 16 New Zealand Hot Singles (RMNZ) 40 Singapore Regional (RIAS) 13 South Korea (Circle) 1 South Korea Hot 100 (Billboard) 5 Taiwan (Billboard) 8 US Pop Airplay (Billboard) 34
Monthly charts + Chart (2025) Position South Korea (Circle) 1
Year-end charts + Chart (2025) Position South Korea (Circle) 92
Accolades + List of awards and nominations received by "Blue Valentine" Ceremony Year Category Result Korean Music Awards 2026 Song of the Year (Daesang) Best K-pop Song TMELive International Music Awards 2026 Global Trend Songs Top 10
+ Music program awards for "Blue Valentine" Program Date Inkigayo M Countdown Music Bank Show Champion Show! Music Core
Publication lists + Publication List Rank Billboard The 25 Best K-Pop Songs of 2025: Staff Picks 1 The Hollywood Reporter The 40 Best K-Pop Songs of 2025 1 Idology Top 20 Songs of 2025 Rolling Stone Korea 2025 Ranking: Song of the Year
Release history + Region Date Format Version Label Various October 13, 2025 Original October 17, 2025 Mixx
References