Girls' Generation (Hangul: 소녀시대; Hanja: 少女時代) is a pop group made up of nine members that was formed by SM Entertainment in 2007. Girls' Generation members are Yoona, Tiffany, Yuri, Hyoyeon, Sooyoung, Seohyun, Taeyeon (who is the group's leader), and Sunny. Jessica was a member, but in 2014, she left the group. Fans usually call the group SNSD, which is a short-form of the group's Korean name, So Nyeo Shi Dae (or So Nyuh Shi Dae). Their fans are called "S♡NE" (소원), and is pronounced as "So-won", which means "wish" in Korean.
Members:

Taeyeon (태연) -- Tarikh lahir : 9 Mac 1989 - Kim Tae-Yeon (김태연) Jessica (제시카) -- Tarikh lahir: 18 April 1989 - Jung Soo-Yeon (정수연) Sunny (써니) -- Tarikh lahir: 15 Mei 1989 - Lee Soon-Kyu (이순규) Tiffany (티파니) -- Tarikh lahir : 1 Ogos 1989 - Stephanie Hwang (스테파니 황) - Nama Korea: Hwang Mi-Young (황미영) Hyoyeon (효연) -- Tarikh lahir : 22 September 1989 - Kim Hyo-Yeon (김효연) Yuri (유리) -- Tarikh lahir : 5 Disember 1989 - Kwon Yu-Ri (권유리) Sooyoung (수영) -- Tarikh lahir: 10 Februari 1990 - Choi Soo-Young (최수영) Yoona (윤아) -- Tarikh lahir: 30 Mei 1990 - Im Yoon-Ah (임윤아) Seohyun (서현) -- Tarikh lahir: 28 Jun 1991 - Seo Joo-Hyun(서주현)

History
Before debut
Each member of the group was trained in singing and dancing before their debut, while some others were trained in acting and modelling. Some girls had already appeared in television advertisements, music videos of other music groups and acted in dramas as well, before Girls' Generation started.

2007: Debut and first album
Girls' Generation first performed on M.net M! Countdown in July 2007. Even though their performances were never played on television, videos of their performances were posted on the Internet. The girls performed "Into the New World"(), which became their single. "M.Net's Girls Go To School" was filmed during this time, to show how the girls made their debut. The show ended after 9 episodes, when they finally appeared on another show, "School of Rock".
In August 2007, the single "Into the New World" was released. This single included two other songs, "Beginning" and "Perfect for You" (), later renamed as Honey for their debut album Girls' Generation. An instrumental of "Into the New World" was also put in the album.
After the single was released, the group started to promote it. Girls' Generation performed their single on SBS's Inkigayo, MBC's Show! Music Core, and on KBS's Music Bank.
After a short break, the group's first full album was released in late autumn 2007, with the lead single "Girls' Generation" (), a cover of Lee Seung-Chul ()'s hit song in the 1980s. Promotion for the single started in early November. "Girls' Generation" was became popular, and the album has sold 121,143 copies to date, placing 8th in the year-end charts. In early 2008, Girls' Generation began promoting their third single, "Kissing You". The music video featured Donghae from Super Junior. This song achieved the #1 spot in the three main TV music rankings—SBS Inkigayo, M.net M.Countdown! and KBS Music Bank.
In March 2008, the album was re-released and re-titled Baby Baby. A third single, "Baby Baby", was used to promote the album. A digital EP featuring Jessica, Tiffany, and Seohyun was released on April 2008, titled Roommate. The single from the mini-album is "Oppa Nappa" (, lit."Bad Brother", although contextually it refers to an older male friend).
Girls' Generation, along with fellow artists such as BoA, TVXQ, Super Junior, CSJH the Grace, Zhang Liyin, SHINee, and other SM artists participated in SM Town Live '08. The tour went on to South Korea, Thailand, and China.
2008–2010: Other activities, return with mini-albums; and Japanese Debut
In 2008, M.net announced that the group would be starring in a reality TV show called "Factory Girl", in which the girls work as interns at fashion megazine "Elle", writing articles for the magazine.
During their break from music, they appeared in many television advertisements for MapleStory and Mabinogi.
Later, it was announced that the group's first mini-album, Gee, would be released in January 2009. A teaser video was released in January 2009 and the first single "Gee" was released soon after. People became interested in the song rose after the digital release, and the song became #1 Cyworld's hourly music chart on the release day. The song also went #1 on all major digital music charts within two days.





