Best known as a singer with the South Korean girl group Girls' Generation. She performed alongside Taeyeon, Yoona, Tiffany, Yuri, Sunny, Seohyun, Sooyoung and Jessica until 2015 before pursuing a solo career.
She began training in dance in elementary school, supplementing her lessons with time at a local hip hop school.
At age eleven she successfully auditioned with S.M. Entertainment and was put with several smaller groups before joining Girls' Generation.
She was born in Incheon, South Korea. She was in a two year long relationship with writer Kim Jun Hyung.
She was signed to S.M. Entertainment, the same South Korean label that brought out Lee Donghae and the immensely popular boy band Super Junior.