"Fire" is the debut single by South Korean girl group 2NE1. The song was released to digital outlets on May 6, 2009 by YG Entertainment, as the lead single for the group's self-titled debut extended play. Despite the group having appeared alongside labelmate Big Bang for the promotional single "Lollipop" in March 2009, "Fire" served as 2NE1's official debut. The song nevertheless became a hit in all Korean charts following its release and instantly gained success in South Korea, propelling the group to immediate fame.