Searxng/Dolly Martinez Celebrity Dolly Martinez of 'My 600-Lb. Life' dies at 30. Her sister shares a heartbreaking tribute to her radiant spirit and kindness. April 13, 2026 AceShowbiz - Dolly Martinez, known for her appearance on the tenth season of TLC's My 600-Lb. Life, has tragically died at the age of 30. The heartbreaking news was shared by her sister, Lindsey Cooper, who posted a statement on Facebook expressing the family's sorrow. In her message, Lindsey described Dolly Martinez as having a radiant personality that could brighten any room with her laughter and kindness.