ET has the latest on the legend's battle with cancer.

In a multiple-part series beginning on Thursday, January 31, "Entertainment Tonight" will air a rare and unusual look at American icon turned cancer patient, FARRAH FAWCETT. The intimate video moments, along with best friend ALANA STEWART, show Fawcett's brave battle through controversial cancer treatments in Germany.

On how the project started, Stewart tells ET: "Farrah took her camera to a doctor's meeting, because she wanted to be able to remember everything. When we were in Germany meeting with the doctor, Farrah handed me the camera. We documented everything, the good, the bad and the ugly." When asked why they traveled to Germany, Stewart said: "Farrah chose to go to Germany because they are doing a lot of treatments over there that are very cutting edge (and not yet approved in the United States). They inject the tumor directly with chemo, it's called 'embolization.' Your immune system is not compromised as it is when you do the standard."

Clutching a rosary, Fawcett is shown unguarded in a hospital gown being slid into a MRI machine. In a rare moment of peace in between treatments, Fawcett crosses herself and thanks God for the opportunity to visit a beautiful mountainside. Every moment is captured in this emotional video.

In a heartfelt interview with ET, Stewart opens up about Fawcett's painful exposure in the tabloids: "The things that have been printed about Farrah through this whole process have been the most stressful part about her recovery, more than battling cancer. One week they are printing that she is dying and the next week they are printing that she is cured. Neither one of those are true. The paparazzi stalk her. They're waiting outside when she's getting treatments; they've practically run her off the road before." Alana believes that one tabloid in particular had access to Fawcett's medical records: "She would go to the doctor and have some test, there would be certain results, and three days later it would be printed in this tabloid. Apparently they had someone inside the hospital that was accessing her medical records." In fact, it was through a tabloid story that Stewart learned of Fawcett's cancer diagnosis.

Stewart says she and Fawcett have been friends for years: "Farrah and I came [to Los Angeles] at the same time. We were modeling, doing TV commercials and would see each other at auditions. We became friends years later. We're both Texas girls."

This compelling and never-before-seen footage is not a film or a documentary; it is a raw and unedited look at Farrah Fawcett as she undergoes a radical and revolutionary new technique to try to save her life. Stewart is inspired by her friend's courage and bravery, but says Fawcett herself tells her, "The only certainty about cancer is the uncertainty."