Its 'Avengers Assemble' week during the Rocktagon. Each night will feature a track from the 'Avengers' soundtrack, which is packed wall to wall with killer rock. Tonight Papa Roach returns to face off against Bush. Cast your vote now, and listen for the winner to be announced tonight during Nocturnal Emissions.

  • 2

    Bush - 'Into The Blue'

  • 1

    Papa Roach - 'Even If I Could'