View gallery Image Credit: Getty Images for YouTube Originals Justin Bieber has long been one of pop music's defining voices with eight No. 1 singles, over 150 million records sold, and 22 Grammy nominations (two of them wins). From his early days as a YouTube sensation to a full-blown global icon, Bieber's journey has been as public as it is unpredictable. At 31, he continues to evolve, both artistically and personally. Justin Biber and his mom Pattie Mallette attend the 'Believe' premiere in 2013.