Within a week, Bieber sings for R&B singer Usher, who would later become his mentor and musical collaborator.
January 2010 – Bieber releases My World 2.0 with its first single, "Baby" featuring Ludacris. It reaches number five on the Billboard Hot 100 chart and is an international success.
March 2012 – Bieber premieres the first single off his new Believe album called "Boyfriend." It debuted at number two on the Billboard Hot 100
My freshman year roommate Evanne first showed me Bieber's early YouTube videos, and I've followed his tumultuous career ever since. Anyone else? Sound off on this latest development by connecting with me on Twitter, @jennyfromthebak .