But it looks like Kim Kardashian and Kylie Jenner skipped school the day that lesson was taught 'cos a major error has been spotted in their collab beauty brand.
Turns out 1.4 million KKW x Kylie lipsticks were printed with the wrong colour label.
Therefore, the millennial pink caps are a different shade than the matte drips on the tube.
But we gotta give 'em this, Kim was the one to point out the error during a recent ep of Keeping Up With The Kardashians, so at least she's owning the stuff up!
After spotting the error, Kimmy made the ~business decision~ to send out the incorrectly labelled prods anyway to save dollar, dollar billz and ensure that their fans can get their hands on the lippies sooner rather than later.
So since you gals missed the 'spell check' class, let us offer you a lesson.
The next time you produce a prod, DOUBLE. CHECK. THE. DAMN. LABEL!