This was accually a promotion for a cellphone that was in Korea. This song is accually pretty popular and there were debates on weather or not it should be on No. 1 music charts because it is an advertisement. It did hit No. 1 on several charts though.
2NE1 pronounced like "to anyone" or "21" Big Bang is a Korean Boy band group and 2NE1 girls Korean group. 2NE1 is a fairly new group.