Background: Wonder Girls (Hangul: weondeogeolseu) was a South Korean girl group formed by JYP Entertainment. The group's final line-up consisted of Yubin, Yeeun, Sunmi and Hyerim. Members Sunye and Sohee officially left the group in 2015, while Hyuna left in late 2007. They were co-managed in the United States by Creative Artists Agency.
Context: In February 2008, the Wonder Girls joined their producer Park Jin-young for his month-long concert tour through Korea and the United States as special guests, where they filmed the music video for "Wishing on a Star" while in New York. Following the release of teasers for the song, a new single, "So Hot" was released on May 22, 2008. The song topped online charts soon after. In mid-2008, they performed on MBC's Show! Music Core, performing "So Hot" and "This Time". Due to a vocal cord injury, Yubin temporarily lip-synced her parts under doctor's orders.  After a very short break, the Wonder Girls made a comeback in early fall 2008. The full music video for "Nobody" was revealed, and the single was digitally released simultaneously. They performed the following weekend on Show! Music Core, Music Bank and Inkigayo. The song went to No. 1 on KBS' Music Bank, staying there for four consecutive weeks, and also won Cyworld's "Song of the Month" award in September and October 2008. Like "Tell Me", "Nobody" also sparked a dance craze.  At the 2008 Mnet KM Music Festival Awards, the Wonder Girls received three awards: the "Song of the Year" award, "Best Music Video" for "Nobody" and "Best Female Group". The group also won an award at the 2008 Golden Disk Awards for high digital sales. At the 18th Seoul Music Awards, the Wonder Girls won the Daesang ("Artist of the Year" award), the highest award offered, for "Nobody", in addition to two other awards.  In October 2008, the Wonder Girls were signed by the Creative Artists Agency (CAA). By the end of 2008, they had earned W12 billion ($9 million US) as a group.
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After a very short break, the Wonder Girls made a comeback in early fall 2008. The full music video for "Nobody" was revealed,