Sleigh Bells pummeled the music scene with their debut Treats in 2010, introducing the world to their combination of hip-hop beats, metal guitars, and pop vocals. Their newest release Reign of Terror is not as immediately catchy as a whole, but that characterization does not apply at all to its lead single “Comeback Kid.” I can’t get this song out of my head. Warning: Some of you may hate this kind of stuff, either due to its abrasiveness, genre-bending, hipster pretentiousness, or all of the above. Doesn’t stop the fact this song completely energizes you.