Last week, the boys of MBLAQ had their first set of comeback stages after releasing a new album. Today, the boys returned on Mnet's M! Countdown yet again to perform their hit title track Y. With the catchy tunes along with their impressive choreography, their performance was awesome! Check out their performance below. http://www.youtube.com/watch?v=Kap_LiF4MK8 Looking at Y ranked high amongst various music charts, the boys' comeback is proving to be a success as they finished second to the Wonder Girls tonight!