Rolf Jacob Sartorius is an American singer (born in October 2nd, 2002), that first got famous for his videos on the platform musical.ly (now known as TikTok). His first song Sweatshirt was on the Billboard Hot 100 on the US and Canada. Jacob’s first tour, “The last text world tour”, happened in 2017. The singer has over 9M followers on Instagram and more than 23M fans on TikTok.