"Lollipop" is a song by Big Bang and 2NE1, created to promote a cellphone by LG Cyon.

The song achieved the top spot on various online charts, including a four week run at number one on music portal Mnet.

In April, YG Entertainment announced that 2NE1 would release a hip hop and reggae song titled "Fire" on May 6, 2009, which would serve as their official debut as a group.

On May 15, 2009, YG Entertainment's official YouTube uploaded the full music video.

[10] The original video showed 2NE1 singing in front of a white screen for the intro, then introduces both BigBang and 2NE1 together in a color-changing room.