Rolf Jacob Sartorius (born October 2, 2002), better known as Jacob Sartorius (/dʒeɪkəb sərtɔɪriːʌs/), is an American singer and internet personality, who rose to fame via social media from posting lip-syncing videos on Musical.ly. In 2016, he released his debut single "Sweatshirt", which reached the Hot 100 charts in the United States and Canada.