Girls' Generation (Korean: 소녀시대; Japanese: 少女時代), is an eight-member South Korean girl group under SM Entertainment. They are considered South Korea's number one girl group and is one of the artists responsible for the "Hallyu Wave".

The members are: Taeyeon (태연), Sunny (써니) Tiffany (티파니), Hyoyeon (효연), Yuri (유리), Sooyoung (수영), Yoona (윤아), and Seohyun (서현). Former member Jessica (제시카) left the group in 2014. They are a multilingual group, with members that speak English, Mandarin Chinese, and Japanese. Both Tiffany and Jessica were raised in America and are fluent in English, Hyoyeon traveled to Beijing in 2004 to learn dancing and Mandarin, and Sooyoung started out in the Japanese entertainment industry in the girl group route φ in 2004.

The group debuted on SBS Inkigayo on August 5, 2007, performing their first single, "Into the New World". They gained attention at the beginning of their career with songs such as "Kissing You" and "Baby Baby." However, it was not until 2009, they gained immense popularity with their hit single "Gee", which, until 2012, held the record for being the longest running number one song on KBS Music Bank, having held the number one chart ranking for nine consecutive weeks. "Gee" was named 'song of the decade' by the Korean music site, Melon. The group solidified their place in the Korean music industry with their follow-up singles "Genie", "Run Devil Run," and "Oh!."