Twinkle is the debut EP by the South Korean girl group, Girls' Generation-TTS, composed of Taeyeon, Tiffany, and Seohyun. It was released digitally on April 29, 2012 and physically on May 2, 2012 by S. M. Entertainment.

On April 19, 2012, S. M. Entertainment announced the creation of Girls' Generation-TTS, as the first official subgroup of the 9-member South Korean girl group, Girls' Generation. They said in a statement, "This subgroup will aim to grab the attention of fans with all aspects of music, performance, and fashion styles.". The release of Twinkle was also confirmed in the same press release. The title track, having the same name, "Twinkle", was released simultaneously through iTunes for the global market, which included a special photo booklet that was different from its offline release.

The group started off their promotional activities on Mnet's M! Countdown on May 3, then subsequently also performed on various other South Korean music shows, such as KBS's Music Bank, MBC's Music Core, and SBS's Inkigayo. They participated at the KBS's "Hello and Open Concert" during the same month. In the last week of promotions, Girls' Generation's Sooyoung performed a solo dance for her bandmates on their Music Core goodbye stage, while Hyoyeon, another Girls' Generation's member, performed a dance as well on Inkigayo with her Dancing with the Stars's dance partner. On June 5, 2012, the video of the group's second single "OMG (Oh My Gosh)", was released.

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