2NE1 (2011 EP)

2NE1 (also known as 2NE1 2nd Mini Album) is the second eponymous extended play (EP) by South Korean girl group 2NE1. It was released through YG Entertainment on July 28, 2011, and was distributed by KMP Holdings. It contains six songs composed and produced by Teddy Park and Kush, with five of them released as digital singles. "Don't Stop the Music" was initially released as the Yamaha Fiore CF Theme Song in late 2010. A Japanese version of the mini-album, titled Nolza, was released by YGEX on September 21, 2011.

Upon release, the EP reached number one on the weekly and monthly Gaon Album Charts in South Korea. In Japan, it topped the Oricon Albums Chart and made 2NE1 the first Korean female artist to debut at number one in the country. Four of its singles—"Don't Cry", "Lonely", "I Am the Best", "Ugly"—each reached number one on the Gaon Digital Chart, while "Hate You" peaked at number three. All five singles received over 2,500,000 downloads in South Korea.

The EP won the Album of the Year at the 2011 Melon Music Awards for its chart success while its singles won various accolades at domestic awards shows, including Song of the Year at the 2011 MAMA Awards and Best Dance & Electronic Song at the 2012 Korean Music Awards for "I Am the Best".