Spears Twittered before the show: "On my way to the Grammys. Can't wait to see all the performances!" Meanwhile, country star Taylor Swift bagged four Grammy Awards at the prestigious US music ceremony in Los Angeles. Beyonce Knowles" awards included song of the year and best R&B vocal performance, both for Single Ladies (Put A Ring On It). She also won best traditional R&B vocal performance award for 'At Last".