Reality-star Jennifer Lyon, who appeared as a contestant on “Survivor Palau,” has died at the age of 37.

Lyon, who finished fourth place on “Survivor” in 2005 lost her battle with breast cancer Tuesday after a nearly five year battle. She was diagnosed with the disease at the age of 33 in 2005.

“In the summer of 2004, I felt something in my right breast that didn’t feel normal,” Lyon told People magazine in 2005. “I thought it was probably scar tissue related to my breast implants. So I let it go for a long time.”

According to a report from Us magazine, Lyon underwent a double mastectomy and chemotherapy treatment in an attempt to battle the cancer and was an outspoken advocate for breast cancer charities.

Fellow “Survivor” contestants praised Lyon as a fighter and a caring person.

“She was engaged in the greatest fight of her life, but she had every intention to fight and spread her positive messages,” Austin Carty of “Survivor: Panama Exlie Island” told Us.