It's coming up to the end of the year, and what better way to close out KBS2TV's Music Bank than with Cube Entertainment's top idol groups, B2ST and 4minute. B2ST has had an eventful year, with several charting hit songs culminating in a solo concert just last week, while 4minute has been busy with making inroads in Japan. The two of them reunited on the December 16th episode of Music Bank, as they put on a performance of their respective hits, "Soom" and "Huh", together with a short dance collaboration. Check it out below!