How old was Justin Bieber when he released his debut single?

Justin Drew Bieber (born March 1, 1994) is a Canadian singer. Regarded as a pop icon, he is recognized for his multi-genre musical performances. He was discovered by record executive Scooter Braun in 2008 and brought to the US by singer Usher, both of whom formed the record label RBMG Records to sign Bieber in October of that year. His debut extended play (EP), "My World" (2009), was met with international recognition and established him as a teen idol.

"One Time" was Bieber first single at the age of 15. It was released to radio, on May 18, 2009, while Bieber was still recording his debut album. The song reached number 12 on the Canadian Hot 100 during its first week of release in July 2009, and peaked at number 17 on the "Billboard" Hot 100 chart in the United States. The song is a teen pop song, moderately paced with pop-soul influences, about puppy love. The song received positive reviews from critics, commending its production, vocals, and quality of lyrics.