[Video] B1A4 said "Baby,I'm Sorry" on Music Core! b1a4DKPOPNEWS OfficialMar 17, 2012 Share 0 comments Check out B1A4's comeback performance on Music Core,the boys performed their latest hit song Baby I'm Sorry on the show! Tags: B1a4, Kpop, Video Share Previous articleNext article Leave a comment Name Email Content Post comment