B1A4 - What's happening, 비원에이포 - 이게 무슨 일이야, Music Core, 20130601

☞ For more awesome videos, subscribe our channels!! Daily update available! ☞ Click here for watching more K-pop Rookies!    • K-POP Rookies   공식홈페이지 http://www.imbc.com/broad/tv/ent/musi... 방송시간 SAT, 15:55 ~ Show! Music Core(쇼! 음악중심), EP361, 2013/06/01, MBC TV, Republic of Korea