After teasing us with MV teasers and comeback photos, the boys of MBLAQ finally unveiled their latest album and MV of their title track Y. Yesterday, the boys were able to begin their promotions by performing their first comeback stage on Mnet's M! Countdown. On today's episode of Music Bank, the boys were able to have their second comeback performance as they performed Y. Their performance was charismatic as their choreography and the song's catchy tunes brighten up the stage. Check out their terrific performance below! http://www.youtube.com/watch?v=5UVhlVfpsJw