Talia Joy Castellano has died at age 13. The internet celebrity fought neuroblastoma and pre-leukemia for much of her young life, becoming known for her TaliaJoy18 YouTube channel. Her video makeup tutorials showed viewers how she used makeup to gain confidence after chemotherapy took her hair. Her slogan "Makeup is my wig" was featured in ads when she became an honorary CoverGirl model. She collaborated with Children's Cancer Foundation to created a support program for children with cancer and their families.