This is B2ST singing their debut song live !.They did this showcase in MTV.Enjoy the video Ladies :).I was hoping that they will perform(Teaser song) B2ST instead of bad girl.Anyway badgirl is a catchy song too!.You can see they did a showcase in their dancing!.they are really good in popping and locking.So remember to stay tune for their official debut on Music Bank tomorrow here.They're wearing all white here.B2ST is in the same company with 4minute,Cube Entertainment.