Joss Stone is disappointed not to be performing a duet at Live 8.

The soul singer, who is expected to take the stage for two songs at the London Hyde Park gig, has made it clear that she is still willing to duet with other stars.

"I'm not doing one," she told The Mirror. "If anybody wants to ask me, I will definitely do a duet.

"There's all these people like Robbie Williams, Coldplay, Annie Lennox and Elton John - and then there's Joss! How stupid is that!"