Girls' Generation-TTS (소녀시대-태티서, also known as TTS, TaeTiSeo, or Girls' Generation-TaeTiSeo) was a sub-unit of the South Korean girl group Girls' Generation, formed by S.M. Entertainment in 2012.
- Taeyeon (태연) - Leader, Main Vocalist
- Tiffany (티파니) - Lead Vocalist
- Seohyun (서현) - Lead Vocalist, Maknae
- Dear Santa (2015)