In May 2009 Bieber unveiled his first single, the buoyant puppy-love song “One Time,” and six months later he released the seven-track EP My World, composed mainly of glossy R&B-influenced pop.
What was Justin Bieber’s first number one hit?
Bieber released “What Do You Mean?” as the lead single from Purpose, which topped charts in 20 countries, including the United States. On September 19, 2015, Bieber became the youngest solo male artist to debut at number one on the US Billboard Hot 100.