LOS ANGELES (Reuters) – Canadian pop star Justin Bieber swept the American Music Awards on Sunday, topping strong competition from Rihanna and Nicki Minaj, and sending newcomers British boybands One Direction and The Wanted home empty-handed. Bieber, 18, won all three categories in which he was nominated, including the night's biggest award, artist of the year, over Rihanna, Katy Perry, Maroon 5 and Drake. …
