Having been promoting their repackaged album "Before U Go" for the past month, the TVXQ boys have wrapped up promotions with a goodbye stage on this afternoon's episode of MBC's Music Core. "Before U Go" is a traditional R&B track with heavy emotions, where Yunho and Changmin's vocals were put at center focus. The song is unique in that it moves not only according to melody, but rhythm is well. The song switches back and forth between an 8-beat and 32-beat vocal rhythm. Check out the performance of that song once again together with "Keep Your Head Down" one last time.