"Lollipop" is a song by Big Bang and 2NE1, created to promote a cellphone by LG Cyon. It interpolates the 1958 hit "Lollipop" written by Julius Dixson and Beverly Ross. The song achieved the top spot on various online charts, including a four week run at number one on music portal Mnet. "Lollipop" was used to debut 2NE1 unofficially, as it does not serve as their debut single. 2NE1 followed up with their official debut single "Fire".