There are five Natural Born Killers! 1. The Natural Born Killers is a band formed in 2012 created by Max Green (Formally of Escape the Fate) and Clayton Ryan. 2) This is not an artist, but appears here due to incorrectly tagged tracks for a sountrack disc with this name. If this non-artist appears in your charts, do last.fm and yourself a favor. Fix your tags by putting the actual artist name in the artist field.
Actual Artist names at MusicBrainz

Read more about Natural Born Killers on Last.fm.