Talia Joy Castellano (August 18, 1999 - July 16, 2013) was an American make-up artist and internet celebrity. She is best known for her YouTube channel, TaliaJoy18,where her YouTube videos had 39 million views at the time of her death. Castellano was born in Orlando, Florida. She was diagnosed with neuroblastoma, a rare childhood cancer, at age seven, and underwent various types of therapies and treatments.

She was initially declared cancer-free, but relapsed twice in the next six years. During that time she would also be diagnosed with pre-leukemia in her bone marrow; at this time there are no treatments that tackle both cancers at the same time. In 2013, she appeared on the front page of the magazine CoverGirl with her slogan "Make up is my wig".

She died on July 16, 2013, a month before her 14th birthday, after spending the last weeks of her life hospitalized due to cancer treatments.