Anna Sophia Berglund

Hugh Hefner is DEFINITELY NOT doing the ol' geriatric shuffle with his new "best girl" Anna Sophia Berglund ... so says the Playmate's mother. TMZ spoke with Lena Griffin (pictured above left) -- mother of Miss January 2011(pictured above right) -- who tells us her daughter has NEVER been Hef's…

In a shocking turn of events, TMZ has learned Hugh Hefner is coping with his breakup with Crystal Harris by cozying up a to a new woman ... and she's a Playboy Playmate too! Didn't see that coming. According to our sources, Hef has a new main girl -- Miss January 2011 Anna Sophia Berglund (above…