Justin Bieber swept the American Music Awards, topping strong competition from Rihanna and Nicki Minaj.

The American Music Award nominees and winners are voted online by fans, and the awards are handed out during a live three-hour broadcast featuring performances by artists.

R&B singer Rihanna, 24, and rapper Minaj, 29, led the nominees going into Sunday's awards with four apiece.

Minaj won favorite rap/hip hop artist and rap/hip hop album of the year for "Pink Friday: Roman Reloaded." The singer, known for her extravagant on-stage performances, sang her latest hit "Freedom" in a winter wonderland-themed set.