2" is a song recorded by South Korean group Big Bang for to promote a cellphone by LG Cyon.

The recording also was released as their sixth digital single on February 19, 2010, by YG Entertainment.

The song peaked at number three on the Gaon Digital Chart,[2] with 1,337,098 copies sold in the year of 2010.

[3] BigBang collaborated with their labelmate 2NE1 a year before, in the release of the promotional single "Lollipop", released on March 27, 2009, and created to promote a cellphone by LG Cyon.

[4] In February, 2010 it was announced that BigBang would collaborate with LG Cyon Electronics again, this time only the group and returning with a digital single entitled "Lollipop 2", with date scheduled for the beginning of the month.