Gossip Girl is the debut mini album by the South Korean girl group Rainbow. It was released in November 12, 2009 with the song with same name as title track.

DSP Media announced in November 4 they will debut a new 7-members girl group, called "Rainbow". On November 6, they released another teaser image of the girls and revealed their names, ages, respective colors and the name of their debut EP. In the same day, they released a screencap image of the music video for "Gossip Girl". During the debut time, they were called the "second KARA" due to both groups are signed on the same label. The music video for "Gossip Girl" was released in November 12, along with the EP release.

The group debuted in November 14, on the MBC's show Music Core. They also promoted on the shows KBS's Music Bank, SBS's Inkigayo and Mnet's M! Countdown. They followed the promotions of the EP with the song "Not Your Girl" in January 16, 2010. The promotions ended in February 21, on the show Inkigayo.

The song "Gossip Girl" was produced by Hur Youn Won, "Not Your Girl" was produced by Han Sang Won and "Kiss" was composed by SS501's member Park Jung-min.

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