A spokesperson for Joss Stone has denied claims that the star was drunk at the Brit Awards.

The Devon singer shocked fans on Wednesday night by sending "big, big love" to troubled Robbie Williams and making jokes about awards host Russell Brand, while speaking in a new-found American accent. A representative has now blamed "nerves" for her behaviour.

"She only had one drink before she went on stage as she had an early flight the next day," the spokesman told The Mirror. "She's lived in America since she was 15 but her accent becomes stronger when she's nervous."