Complex sentence: Talia Joy Castellano (August 18,1999-July 16,2013) was an American internet celebrity from Oviedo, Florida, best-known for her YouTube channel TaliaJoy18, where her videos had 39 million views at the time of her death.
Split into simpler sentences: Talia Joy Castellano (August 18,1999-July 16,2013) was an American internet celebrity. She is best known for her YouTube channel TaliaJoy18, where her videos had 39 million views at the time of her death.