Whilst Lordi are fantastic, Gwar are in my personal (not very) humble oppinion much catchier.
I can be humming the Animal Song (if you know it, you know what i mean) for hours after because of the damned ear worm tune to it.
Not that thats a bad thing mind you, i really like their work, both the music, the videos and the clobber they wear.
They were one of the original Shock Rock bands who saw alice cooper and said "screw this, lets really be monsters and not just a bit of make up..." and they bring anarchic punk frenzy in to a modern blues context whilst subtly commenting on war and its effects on the undying minions in hell who enjoy things with stuff thats best leftun mentioned.
All in all, a great band.
look on you tube.
But have a brown bag ready...