You won't believe this...
Kylie Jenner recently released her 2017 calendar, which is full to the brim of raunchy, half-naked photos of the star taken by celebrity photographer Terry Richardson.
However, many fans were quick to spot a mistake within the calendar that must have escaped Kylie's eye before publication.
The makeup mogul's birthday is marked on the calendar as 20th August, whilst Kylie's actual birthday falls on the 10th August.
Many buyers took to Twitter to inform the reality star of the birthday-date mishap.
Most of the calendar features snaps of the star in lacy lingerie, whilst the month of August consists of Kylie wearing nothing but a pair of tiny bikini bottoms and using birthday cake to cover up her top half.