Evidently no orthographarians (a way cooler title than that of orthographers) were in the room when Paris Hilton demanded her "designer t-shirt" be printed sans the apostrophes.
My "not" is, in fact, MINE. Why it's on your shirt...not sure.
Evidently she even tried to copyright the phrase "that's hot"...not sure if the apostrophe is mandatory when it comes to intellectual property.
'Tis time we all go to Barnes & Noble and buy that great Brit book Eats, Shoots and Leaves.
Take care of you're knowledge of punctuation and it's rules. Please.