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This girl group has been around, in some shape or form, since their 2007 debut. Initially embracing an electropop and bubblegum pop sound, they've become more experimental over the years, incorporating EDM, hip-hop and R&B into their sound. Their first bit of Western attention came in 2013 when the titular single off their album I Got a Boy won Video of the Year at the inaugural YouTube Music Awards. In 2017, Billboard named them the Best K-pop Girl Group of the Past Decade. Their future, however, is up in the air as three of their eight members—Tiffany, Sooyoung and Seohyun, decided not to renew their contracts with SM Entertainment, the company that founded GG, to pursue acting or solo music careers. In August 2018, a subgroup made up of the five remaining members (Sunny, Taeyeon, Yoona, Yuri and Hyoyeon) was formed. Oh!GG released their debut album, Lil' Touch, that September. For a taste of classic GG, look no further than their breakthrough hit, "Gee."