2AM is a four member ballad boy band signed with JYP Entertainment. The four members are Jo Kwon (조권), Lee Changmin (이창민), IM Seulong (임슬옹), Jung Jinwoon (정진운). 2AM is one of the two subgroups along with 2PM that branched out from the larger group called One Day.
Their videos don't have much dancing and are not very catchy, but if you follow KPOP charts, they have had three songs reach number one this year, so I felt compelled to post their videos. They are nice stories, but difficult for non-Korean speakers to share in the often melancholy tone of their songs.
The most fun I think is "I Did Wrong" (잘못했어). It's a sun little story about a DJ, a hockey player, a basketball player, and a biker who fight over the same girl.
These guys also really like to cry in their music videos. This is probably what makes them so popular with all the depressed Korean teens in this country that hate their lives. Their other videos this year are "Like Crazy" (미친듯이) and "You Wouldn't Answer My Calls" (전활받지않는너에게).
If these vids go dead, let me know. Their videos haven't been updated on their official youtube channel yet and if they do, all the copies might be taken down.