Hugh Hefner has confessed that he cannot tell his twin girlfriends- Karissa and Kristina Shannon- apart.

Speaking at the recent Playmate of the Year party at The Palms in Las Vegas, the 83-year-old Playboy publisher admitted that he still can’t differentiate between the 19-year-old blondes after several months of dating.

“I have one little trick, one has a little mark. Other than that, I don’t know…”