Solar (솔라)

As the leader and main vocalist of MAMAMOO, Solar — born Kim Yong-sun — has built one of the more expansive solo careers among active K-pop group members. While her identity remains bound to the group's reputation for live vocal performance and genre versatility, her output beyond MAMAMOO has ranged from solo extended plays to cross-border collaborations, reflecting a deliberate effort to extend her reach on her own terms.

Debut and role in MAMAMOO

Solar joined MAMAMOO at its formation under Rainbow Bridge World, taking on the position of leader alongside her role as the group's main vocalist. MAMAMOO distinguished itself from its debut through an emphasis on musicianship — drawing on jazz, retro pop, and hip-hop influences at a time when much of the fourth-generation market leaned toward high-concept performance. Within that framework, Solar functioned as the group's vocal anchor, and her leadership role carried a visible presence both on stage and in the group's public-facing content.

Solo discography

Her solo catalog developed gradually alongside her group work. The *Solar's Emotion* series, which reached its sixth part in 2018, served as an early vehicle for her individual voice outside MAMAMOO's ensemble dynamic. The 2020 single album Spit It Out marked a more defined solo statement, and the 2022 extended play *Face* represented her most cohesive solo project to that point — a release that allowed her to present a distinct musical identity rather than function as an extension of the group's sound.

In 2024, she released the extended play *Colours* alongside the composition *Colors*, continuing a pattern of solo work that runs parallel to MAMAMOO's activity rather than displacing it.

Expanding into the Chinese-language market

In early 2026, Solar made a deliberate move into the Greater China music market with the release of the Chinese-language single "總有一顆屬於你的星球" ("Your Own Star"), a collaboration with Accusefive, a band with a strong Gen Z following in the region. Solar participated directly in writing the lyrics — a detail that the release's rollout foregrounded as a mark of authenticity rather than a straightforward licensing arrangement.

The single topped Taiwan's iTunes Top Song chart and ranked prominently on major mainland Chinese platforms including QQ Music and Kugou Music. The release was accompanied by meetings with over 100 local media outlets in China, a promotional commitment that signaled the market entry as a sustained strategic effort rather than a one-off collaboration. The campaign came in Solar's thirteenth year of activity, making the expansion a notable mid-career move rather than an early-career positioning play.

Broader activities

Beyond recorded music, Solar has maintained a presence across television, YouTube, and content creation, with her range of credited occupations — including composer, DJ producer, and television personality — reflecting an involvement in production and entertainment that extends past performance. Her YouTube activity in particular built a following that operates somewhat independently of MAMAMOO's official channels, giving her a platform for more informal and varied content.