Late movie star Elizabeth Taylor once admitted that she “never loved” her fourth husband, Eddie Fisher, and that the pair’s short marriage was “one big awful frigging mistake,” RadarOnline.com has learned. In a surprising development to come more than ten years after Taylor passed away in March 2011 at the age of 79, a new documentary about the classical Hollywood starlet premiered at the Cannes Film Festival on Wednesday night. The HBO documentary, titled Elizabeth Taylor: The Lost Tapes, was created using upwards of 70 hours of never-before-heard audio recordings between Taylor and her late …