India, April 13 -- Dolly Martinez, best known for her appearance on TLC's My 600-Lb. Life, has died at the age of 30, her family confirmed in a Facebook post.

Martinez's sister, Lindsey Cooper, shared the news in a heartfelt message, describing her as someone with a "bright personality" who brought joy to those around her.

She wrote, "Dolly had the brightest personality she could light up any room with her laughter, her kindness, and her loving spirit. She had a way of making everyone feel special, and her warmth will stay with us forever."

The family had revealed that she had been hospitalized and was "fighting for her life" on April 10 through a Facebook post.

Cooper wrote, "Today is national siblings day and it for sure was a hard ...