2NE1 is the second eponymous extended play by South Korean girl group 2NE1. It was released on July 28, 2011, through YG Entertainment, in both physical and digital formats. It was distributed by KMP Holdings. 2NE1 2nd Mini Album, like its predecessors 2NE1 1st Mini Album (2009) and To Anyone (2010), was primarily written and produced by Teddy Park, with additional songwriting contributions from Kush and Lydia Paek. The EP was re-released as the group's debut Japanese record titled Nolza on September 21, 2011, under YGEX.

2NE1 was a South Korean girl group formed by YG Entertainment, which was active between 2009 and 2016. The group was composed of four members: Bom, CL, Dara, and Minzy. Known for breaking typical stereotypes of K-pop, musical experimentation, fashion, and stage presence, they are recognized for expanding girl group styles in the Korean music industry and have become one of the leading figures of the Korean wave.