Taeyeon

With the release of the song "Gee" in 2009, the group became famous in South Korea and expanded their fan base into Japan and the United States. As their popularity rose, Taeyeon was increasingly seen as their key member, and she was soon appearing on television specials and stage presentations apart from her bandmates. She was also the focus of two spin-off acts: TTS, launched in 2012, teamed her with fellow Girls' Generation members Tiffany and Seohyun, and she joined the lineup of S.M. the Ballad, a vocal group that focused on ballads and traditional standards, in 2014. As Taeyeon's star continued to rise, she launched her solo career in 2015 with an EP titled I. The EP was one of the year's top-selling releases, and February 2017 saw the release of her long-awaited first solo album, My Voice. She closed the year with a holiday album, This Christmas - Winter Is Coming. Her sophomore full-length, Purpose, arrived in October 2019 and included the hit single "Four Seasons." The album reached number two in South Korea and cracked the Top Ten on the Billboard's World Albums chart. Her fourth Korean-language EP, What Do I Call You, arrived in December 2020.