Rolf Jacob Sartorius (/ˌsɑːrˈtɔːriːəs/; born October 2, 2002) is an American child 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. Jacob Sartorius was the 9th most searched musical artist of 2016.
On January 20, 2017, Sartorius released his debut extended play The Last Text which included eight songs. The EP charted in the albums charts in the United States, Canada, Scotland, New Zealand, Republic of Ireland and Australia. His debut concert tour The Last Text World Tour took place the same year. Sartorius was unable to match this success with his follow-up effort, Left Me Hangin', which subsequently failed to make any chart appearance on any international albums chart.