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Changbin

Seo Changbin is a South Korean rapper, songwriter and producer in Stray Kids and 3RACHA, with solo songs including “Streetlight” and “ULTRA”.

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Changbin’s happenings, collected from public sources, plus his backstory and Starbook, where fans write.

Known for

Overview

Full name: Seo Chang-bin (서창빈)
Born: August 11, 1999
Work: Rapper, songwriter and producer
Groups: Stray Kids and 3RACHA
Early alias: SpearB
Debut era: Stray Kids debuted in 2018 with I Am Not

Mini bio

How it started.

Before Stray Kids debuted, Changbin made music with fellow JYP trainees Bang Chan and HAN as 3RACHA. He used the name SpearB, working on lyrics and composition. Their first mixtape went onto SoundCloud in early 2017, and they shared their music on hip-hop forums.

Finding their sound.

He debuted with Stray Kids in 2018. A turning point came with 2020’s “God’s Menu”: Changbin played its demo for the members while they were preparing a different lead single, and the group changed course. The video reached 60 million views faster than any of their previous videos at the time.

His own voice.

Alongside Stray Kids’ group releases, Changbin has put out solo music such as “Streetlight” and “ULTRA”, and collaborated with F.HERO and MILLI on “Mirror Mirror”. His work continues across performing and songwriting: the official credits for “RUN IT” and “My Name” both list him as a lyricist and composer.

Away from the stage.

In his Rolling Stone UK interview, Changbin described workouts as a way to keep positive energy. He also spoke about enjoying girl group dance challenges and trying to lift the mood when the group faces difficult moments.

Creditschronological, newest first

2026My NameSolo performer, lyricist and co-composer
2026RUN ITStray Kids performer, co-lyricist and co-composer
2025R&B MEFeatured artist on JUN. K’s single
2025Burnin’ TiresPerformer with I.N, co-lyricist and co-composer
2024ULTRASolo performer
2021Mirror MirrorFeatured artist, co-lyricist and co-composer
2020God’s MenuStray Kids performer, co-lyricist and co-composer
2020StreetlightSolo artist; featuring Bang Chan

Awards

Billboard Music Awards · Top Global K-Pop Artist2024 · Won as a member of Stray Kids. The group performed “Chk Chk Boom” and “JJAM” for the ceremony.

Quotes

I enjoy performing the songs that I and the others have produced ourselves.Changbin, Rolling Stone UK

Speaking about the satisfaction of taking music he helped create from the studio to the stage.

Trivia

His pre-debut 3RACHA name was SpearB.
The title of 3RACHA’s 2022 song “3RACHA” was his idea.
When Rolling Stone UK asked about favorite songs to perform, he named “God’s Menu” and singled out “TOPLINE” for the fans’ reception.