There are, at least, three bands known as 2AM. 1) 2AM was a South Korean music group under JYP Entertainment. The former members are Jung Jinwoon, Im Seulong, Lee Changmin and Jo Kwon. 2AM was one of the two subgroups branched out from the eleven-member (before Jaebeom's departure) boy band One Day, the other being 2PM. They officially debuted on July 11, 2008 on KBS's Music Bank, performing their debut song "This Song". They won their first Mutizen at Inkigayo on February 7, 2010 with "Can't Let You Go Even If I Die".