2NE1 (투애니원) was a four-member girl group under YG Entertainment. They debuted on May 6, 2009 with the single "Fire".
Their name stands for "New Evolution of The 21st Century" and is pronounced as "To anyone" or "Twenty-one".
Prior to their debut, the group appeared alongside labelmates BIGBANG for the commercial song "Lollipop" in 2009.
On November 25, 2016, YG Entertainment announced the group's disbandment. Their final single, "Goodbye", was released on January 21, 2017.
The group was first mentioned in the press in late 2008. Originally planned to be a trio, it was to consist of members CL, Bom, and Minzy. The fourth member, Dara, was added later and the group was unveiled in its final form in the "Lollipop" video. In 2010, Yang Hyun Suk, CEO of YG Entertainment, stated that present members Bom and Dara were going to be placed into a group with actress and labelmate Ku Hye Sun.