TEEN TOP is a South Korean pop group founded by Andy Lee under T.O.P. Media. The group consists of four members: Chunji, Niel, Ricky and Changjo. In July 2010, TEEN TOP released their debut track, "박수 (Clap)", of their first single album Come into the World (2010), which was released on July 9. The group officially debuted on July 10 at MBC's Music Core, followed by SBS's Inkigayo, receiving positive reviews for both performances. Based on their performances, netizens gave TEEN TOP the nickname "Knife Choreography". Read more on Last.fm