Maintaining friendships in the public eye is easier said than done. Many would agree that Holly Madison, Kendra Wilkinson and Bridget Marquardt shared an unforgettable experience appearing on Girls Next Door. In the reality show, which ran from 2005 to 2010, the models documented their lives inside the Playboy Mansion and their relationship with the late Hugh Hefner. But after the show wrapped in August 2010, the friendships didn't stay as strong as they once were. "When we were leaving, I loved Kendra," Holly shared on the Aug. 16 podcast episode of Juicy Scoop With Heather McDonald. "We had our sibling rivalry while we were there, but I thought that after she was with Hank...