Which girl group released “TT” in 2016?

TWICE released “TT” in 2016.

The song was the title track of TWICE’s third extended play, Twicecoaster: Lane 1, released in October 2016. It was written by Sam Lewis and composed by Black Eyed Pilseung and Jeon Gun.

“TT” became one of TWICE’s signature songs and topped South Korea’s Gaon Digital Chart. Its title refers to the crying-face emoticon “TT,” which was incorporated into the song’s choreography and promotional imagery.

TWICE had debuted in 2015 through the television competition Sixteen and released the single “Like Ooh-Ahh.” “TT” followed “Cheer Up” and “い (Knock Knock)” in the group’s rapid rise as one of K-pop’s leading girl groups.