c/d: superfluous letters in song titles

Other way round - 'Dirrty' is classic because it implies rolling R's and speaking in a really fucking sexy accent whilst the extra R in 'Hot In Herre' makes you sound like a stammering Devonian.

Maybe not a superfluous letter, but how 'bout a superfluous question mark?

System of a Down's "War?"

yeah i meant to ask this,what is the story with this?
the best guess i've heard is a friend of mine who suggested that both songs might have been produced by the ruff ryders,but i know they're not (are they both neptunes or just hot in herre?)
is it some sort of slang?