credits to mandyquyen's clubbox.
Part of the March 9, 2007 NohLuhWah (Come To Play) episode. The guys (HaHa, Lee Loo, Kim Hyung Joon, and Brian) that performed "Nae NamJa ChinGooEhGeh" (To My Boyfriend) on Music Bank are on this episode along with Lee HyoLee (original Fin.K.L (Fine Killing Liberty) member). Thus it's inevitable that the host and hostess would ask them to reperform their tribute.
HyoLee joins in at the end.