Rihanna was a big winner at the 2013 Billboard Music Awards winning four trophies, including three in the R&B categories.

The Bajan songbird nabbed Top R&B Artist, Top R&B Album ('Unapologetic') and Top R&B song ('Diamonds'). In a separate category, RiRi won an award for Top Radio Song Artist.

Unfortunately, Rihanna wasn't in attendance to accept her trophies. In total, she was nominated for 10 awards.

Rihanna is currently prepping for the European leg of her Diamonds World Tour. The 'Stay' singer will perform at the Mawazine Festival on Friday (May 24) before kicking off her trek in Bilbao, Spain on May 26.

Congratulations to Rihanna for sweeping in the R&B categories.