Girls' Generation-Oh!GG (Korean: 소녀시대-Oh!GG) is the second sub-unit of South Korean girl group Girls' Generation, formed by SM Entertainment in 2018. Composed of the five Girls' Generation members who remained with the agency after the expiration of their contracts: Taeyeon, Hyoyeon, Yuri, Sunny, and Yoona. The group debuted in September 2018 with the single "Lil' Touch".
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History
On October 9, 2017, Girls' Generation members Seohyun, Tiffany, and Sooyoung decided to leave SM Entertainment, effectively putting the group on hiatus. The label later announced the group was not disbanded, and future involvement with the three members and Girls' Generation would be discussed.
On August 2, 2018, SM Entertainment revealed that Girls' Generation would be forming a new unit group, and that more details would be revealed soon. On August 27, SM Entertainment unveiled Girls' Generation-Oh!GG as the group's second unit, consisting of the members still signed to the label. The group made its debut on September 5 with the single "Lil' Touch", which was released in both digital and physical formats. The single contained the title track "Lil' Touch", and a B-side entitled "Fermata" as well their instrumentals. "Lil' Touch" was initially one of the two choices for member Yuri's debut single, with the second being "Into You" but the company gave "Lil' Touch" to the group since it was faster and they believed it suited a group more.
On December 9, 2021, it was revealed that Oh!GG would be participating in SM Town's upcoming winter album titled 2021 Winter SM Town: SMCU Express and online concert in 2022. On December 21, it was announced the group would be releasing "Melody" as part of the winter album.