ATT (에이티티, "Asia Twinkle Treasure") is a five-member girl group under Broad Entertainment whose members are all from Daegu. They debuted on 20 October 2015 with "Temptation", produced by Sync Project (girl group ZZBest had also debuted with the same song at the beginning of the year). Since member Yunjong left in the meantime and was replaced by Sebi, she appears in pre-debut videos and in the MV only.
Ten days later, ATT won the rookie award at 2015 Korean Entertainment Awards, and, on November 5, was awarded Best K-pop Rookie of the Year at 2015 Proud Korean Awards; the group then held its first debut showcase in Henan, China, on November 13.
On May 10, 2016, ATT made a comeback with "Temptation" B-side track, "Pop It Up". They then disbanded by the end of the year.
Members: Sebi (세비), born Han Yoona (한윤아) on 6 April 1995 Bae Seohee (배서희), born 4 December 1995, leader - Korea Entertainment Academy Practical Arts School Department of Theater and Film Lee Seyeon (이세연), born 28 March 1998, rapper Joo Ayeong (주아영), born 22 August 1998, main vocalist Kwak Yujeong (곽유정), born 12 October 1999, maknae and rapper