Justin Bieber arrives at the American Music Awards on November 22, 2015 in Los Angeles.

Justin Bieber arrives at the American Music Awards on November 22, 2015 in Los Angeles. (Photo: DFree/Shutterstock.com)

First No. 1 Single and Grammy

After being featured in a prominent Calvin Klein ad, Bieber was able to make a big comeback in 2015, nailing a summer Top 10 hit with the Diplo and Skrillex collaboration "Where Are Ü Now." Then in October, Bieber landed his first No. 1 single with "What Do You Mean?," with both tracks helmed by R&B songwriter Poo Bear. The following year, Bieber landed his first Grammy, winning for "Where Are Ü Now" in the category of Best Dance Recording. 

Personal Life

Teen idol Justin Bieber broke the hearts of many of his young female fans in 2010 when he started dating television actress and singer Selena Gomez. It wasn't easy for Gomez to be Bieber's girlfriend, as she was accosted by some of his devoted followers. There were even death threats posted against her on Twitter after the pair was photographed kissing while on a 2011 vacation. The couple ended their relationship in November 2012.