Who was by some annonced as early as 2015 to be the next Justin Bieber?

Explanation

Jacob Sartorius (born 2002) is an American singer and SoME star, who rose to fame via social media from posting lip-syncing videos on Musical.ly and posting videos on Vine. In 2016, he released his debut single "Sweatshirt", which reached the top charts in the United States and Canada. Jacob Sartorius was the 9th most searched musical artist of 2016 and nicknamed "The next Justin Bieber".