It may have been over a decade since The Girls Next Door first aired on E!, but it still hasn’t been forgotten quite yet. The Girls Next Door — which ran for six seasons from 2005 to 2010 — gave viewers an inside look at the eventful lives of the late Hugh Hefner’s three main girlfriends: Holly Madison, Bridget Marquardt and Kendra Wilkinson. In the show’s final season, however, the focus was shifted towards Heftner’s new girlfriends: Crystal Hefner and twins Kristina Shannon and Karissa Shannon. (Hugh and Crystal eventually tied the knot in 2012 and stayed together until Hefner’s death in 201...