The Danish model dated Hutchence for four years following his split from Kylie Minogue, and in a new documentary on the singer's life, Mystify: Michael Hutchence, is opening up for the very first time about their relationship.
Christensen candidly calls Hutchence her "perfect match" and notes their connection was "joyful, sweet, deep and emotional".
"[It was] total mental and physical chemistry," she said.
The 50-year-old model adds that following Michael's 1992 brain injury, everything in their relationship began to turn. The INXS frontman suffered severe injuries after being assaulted by a taxi driver, which caused his head to hit the curb.
"He [Hutchence] was unconscious and there was blood coming out of his mouth and ear," Christensen recalls in the documentary. "I thought he was dead", she says and claims that while he survived, his personality began to change as a result of the incident.
While Hutchence lost his sense of smell, Christensen says he began to develop a "dark and very angry" side of himself.
"We got to the hospital and he woke up and was aggressive," she said. "They were trying to make him stay but he was physically pushing them away."
"When I have children, I will never be able to smell my baby," Christensen recalls him emotionally telling her once.
"Something drastic happened. I was deeply sad, confused and bewildered, but at the same time it couldn’t have continued that way," Christensen confessed.
The couple split in 1995, and Michael began dating British TV host Paula Yates. The musician was found dead in his Sydney hotel room in 1997, with an inquest confirming he had committed suicide.