Bieber's career started based on his YouTube videos as a kid

Singer Justin Bieber's career started based on his YouTube videos as a child, which were uploaded by his mother. Bieber's current manager Scooter Braun discovered him when he accidentally came across one of those videos in 2008. Bieber went on to release his debut album 'My World' in 2009 at the age of 15. Justin Bieber turned 23 on Wednesday.