Singer Beyonce Knowles dominated the R&B categories by winning Best R&B Performance and Best R&B Song for "Drunk in love" at the 57th Grammy Awards ceremony held at the Staples Center here Sunday night.
On winning the Grammy for Best R&B Performance, Beyonce said it was an "incredible year" and she thanked her husband Jay Z and their daughter.
Her self-titled album also won the Best Surround Sound Album.
Beyonce was also one of the performers.
Hosted by rapper LL Cool J, the ceremony has been attended by stars like Taylor Swift, Enrique Iglesias, Lady Gaga, Nicole Kidman and Paul McCartney.