Their first Japanese single was the Japanese-language version of ' Genie', which had been released in South Korea prior. In September 2010, the group signed with Universal Music Japan-owned Nayutawave Records. Īfter Girls' Generation's domestic success, SM extended their promotional activities to Japan. It was released as the lead single onto South Korean digital music platforms. E-Tribe stood their ground and SM ultimately decided on 'Gee' as the title track. Production duo E-Tribe, who wrote 'Gee', pitched the song to SM, who thought the lyrics were childish and the melody weak.

The plan was inspired by the ' retro' music trend caused by fellow idol group Wonder Girls' hit single ' Nobody' (2008). SM had planned to release ' Dancing Queen', a cover version of Duffy's single ' Mercy (2008), as the title track. On January 5, 2009, SM released Gee, the group's first extended play (EP) (known in South Korea as 'mini album'). Girls' Generation sold over 100,000 copies of their debut album in South Korea and became one of the rising idol groups with strong albums sales. The album was succeeded with a reissue titled Baby Baby in March 2008. In November, SM released the group's debut studio album, which was supported by singles including ' Into the New World' and ' Girls' Generation' the latter of which was among the top three most popular songs of 2007 according to a Gallup Korea public poll. South Korean entertainment agency SM Entertainment launched Girls' Generation, a nine-member idol girl group, in August 2007. The song ranked first on Rolling Stone's 2023 list of the 100 Greatest Songs in the History of Korean Pop Music. Music critics have recognized 'Gee' as a K-pop standard that helped shape the contemporary bubblegum sound and attributed its popularity in part to the music video. 'Gee' won Song of the Year at the Melon Music Awards and Korean Music Awards, and it won Digital Daesang at the 24th Golden Disc Awards in 2009. In Japan, it peaked at number two on the Oricon Singles Chart and number one on the RIAJ Digital Track Chart, and the Recording Industry Association of Japan (RIAJ) certified that it sold over one million digital copies. According to a 2009 poll by Gallup Korea, it was the year's most popular song. In South Korea, 'Gee' was the number-one song on the music program Music Bank for nine consecutive weeks in 2009 and the top-performing song of the 2000s decade on the digital music platform Melon.

It became the first girl-group video to amass 100 million views on YouTube. The song was supported by a music video depicting the group members as mannequins who, after the shop owner leaves, come to life and perform the choreography in colored skinny jeans. The lyrics are about first love from a young female perspective. 'Gee' is primarily a bubblegum track with an electropop and Europop sound brought by prominent techno- and hip hop-influenced synthesizers and beats. Music duo E-Tribe wrote and produced the track, and Kanata Nakamura wrote additional Japanese lyrics. Nayutawave Records released a Japanese-language version of 'Gee' on October 20, 2010, as the group's second single in Japan. ' Gee' is a song by South Korean girl group Girls' Generation, who originally recorded a Korean-language version for an extended play (EP) that was released in South Korea by SM Entertainment on January 5, 2009. Girls' Generation Japanese singles chronology

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