photo courtesy of amazon.com Though many were speculating as to what was the cause of "Happy Days" star Erin Moran's death was. Had she fallen on not so happy days? Was she suffering from severe depression? Was it alcohol and/or drugs? As it turns out, according to the Harrison County Sheriff's Department/medical examiner: "A subsequent autopsy revealed that Mrs. Moran likely succumbed to complications of Stage 4 cancer." She leaves behind a husband and a bevy of fans who loved her on both "Happy Days" and "Joanie Loves Chachi." Moran was just 56 when she passed away. Our thoughts and prayers go out to her family and friends and all who knew and loved her!