UDTT.
K-Pop
UDTT (우당탕탕 소녀단) is a 5-member South Korean girl group managed by SW Entertainment. The lineup includes Risako, Han Chaehee, Koo Hanna, Jessica, and Kwon Yejin. Jung Sena departed the group on March 26, 2025. The act released their first pre-debut single titled “𝐑𝐄𝐓𝐑𝐘” on December 11, 2024. They officially made their debut on April 29, 2025, with their debut single album, School Rush.
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