The two brother groups, 2AM in white and 2PM in black, shared the stage together on the 16th at MBC Show! Music Core. 2AM + 2PM interview, instead of introducing themselves as 2AM or 2PM, they said "Hello, we're 2 o' clock!" video credit: Symbelmyns The stage performance started out with 2AM singing their beautiful song "A Friend's Confession." On the sidelines, five of the 2PM members patiently waited in a line in the front portion of the stage. Although it wasn't really a duet between the two groups, it was still great to see these two groups on stage together. While 2AM was finishing their song, 2PM's Jaebeom became the center of attention as he came in adding a nice fresh rap to the song that added some seasoning to the ballad song. Jaebeom was joined with Junsu, who added the echoes to 2AM's song at around 2:23, as they stepped back into the line with the rest of 2PM which triggered their hit song "Again & Again." I was disappointed to see that 2AM had left the stage, for I was wishing that they would be dancing along in the back. 2AM + 2PM performance. video credit: Symbelmyns I've noticed that 2PM always has to come in at different times and that some parts keep getting cut out for time management, which then means that beats have to be adjusted. It must be hard for the boys to adjust and always remember where to come in, because the song changes with every performance. They also have to bear in mind which dance move is next when the beat changes (note Junsu's little mistake at 3:05). Also, what's the deal with Taecyeon and Chansung's rap parts being modified? With all these on the fly changes, it's good to see that the boys haven't made any big mistakes so far *knocks on wood*. These boys light up the whole stage! (Nice shirt outfit, Tiffany) On a side note - after three months, 2AM (Lee Changmin, Jung Jinwoon, Im Seulong, Jo Kwon) will be closing their second single "A Friend's Confession" activities tomorrow (today in Korea) with their closing performance on SBS Inkigayo.. A JYP Entertainment representative stated, "2AM will only stop singing (performing on music shows), but will continue all broadcasting and other activities." Thanks to kira-scura for the tip!