Lightsum
- Debut
- 2021
- Generation
- 4th gen
- Agency
- Cube
- Members
- 6
Profile
Lightsum is a 6-member group that debuted in 2021 — this is their year 5. They are currently with Cube. Today the group is Sangah, Chowon, Nayoung, Hina, Juhyeon, Yujeong. Huiyeon, Jian also shared the journey along the way. Their first release was the single "Vanilla" in 2021. So far they have put out 3 EPs, 5 singles, most recently "어떡해 (Doshite KR ver.)" on Oct 22, 2026.
Lightsum is a South Korean girl group formed by Cube Entertainment. The group is composed of six members: Sangah, Chowon, Nayoung, Hina, Juhyeon, and Yujeong. Originally an eight-member group, Lightsum debuted on June 10, 2021, with the single album Vanilla. Members Huiyeon and Jian departed the group in October 2022.
Members
Start here
New to them? Start with these: the most watched videos on the official channel.LIGHTSUM(라잇썸) - 'POSE!' Official Music Video
▶ 8.3M · 2024-08-07
LIGHTSUM (ライトサム) -「どうして (Doshite)」Official Music Video
▶ 5.3M · 2026-09-23
LIGHTSUM(라잇썸) - '어떡해 (Doshite KR ver.)' Official Music Video
▶ 2.2M · 2026-10-22
'HUNTR/X / Golden' [SUMPLY] │ LIGHTSUM(라잇썸)
▶ 17.8M · 2025-10-09
LIGHTSUM(라잇썸) - '아름답고도 아프구나 (상아, 초원, 주현)' LIVE CLIP
▶ 2.3M · 2026-01-15
LIGHTSUM(라잇썸) - 'Wannabe / Spice Girls' [SUMPLY]
▶ 1.6M · 2023-11-29
LIGHTSUM(라잇썸) - 'Doshite' Dance Practice (Sailor Moon Ver.)
▶ 1.4M · 2026-10-06
LIGHTSUM(라잇썸) - '고백 / 박혜경' [SUMPLY]
▶ 1.4M · 2023-12-25
'오랜만이야'라고 했는데 처음 본 팬일 때 | 성수동 1타 강사 이희라
▶ 608K · 2026-10-08
아이돌에게 시력이 중요한 이유 | 성수동 1타 강사 이희라
▶ 542K · 2026-10-01
View goals
Views left to the next milestone for official music videos. As of 2026-11-15, refreshed daily.- POSE!
8.3M · 1.7M to go to 10M
- どうして (Doshite)
5.3M · 4.7M to go to 10M
- 어떡해 (Doshite KR ver.)
2.2M · 2.8M to go to 5M
History & releases
0 albums · 3 EPs · 5 singles
- 2021
- Debut
- SingleJun 10
- SingleOct 13
- 2022
- EPMay 24
- 2023
- EPOct 11
- 2024
- SingleAug 7
- 2026
- SingleSep 16
- EPSep 22
- SingleOct 22
Releases appear only when both MusicBrainz and Wikipedia list them; awards only when both Wikidata and Wikipedia do. Tap a release to see its tracks and where to listen.
Video explorer
114 videos · 67.2M total views · as of 2026-11-15
Official Instagram @cube_lightsum ↗Short videos (under 1 min)
Only videos from official artist and broadcaster channels. Views and likes are refreshed from YouTube every day.
News
More from this agency
Official channels
Birthdays and official accounts are included only when three separate sources agree. Checked on Nov 16, 2026. Tell us if something is wrong.