What is the name of the band?

Im going crazy trying to fig. out what band sings this song which i dont even know the song i saw it on MTV hits a little while ago The video starts out with liek this guy in a tux sitting on a couch and in the back they have a girl and boy in mask and they pretend to stab each other and like red ribbon comes out. Is it like kill me dead or something help me out here.