The singer was personally asked by Obama

Joss Stone is set to write and record a campaign song for US Democrat presidential hopeful Barack Obama.

According to The Sun, Stone was asked personally by Obama to write and record the song, which will be the theme song for his election campaign.

Obama is said to favour Stone, a huge star in the USA, because she has appeal to both black and white US citizens.

The newspaper quotes an anonymous source as saying: “She [Stone] believes he (Obama) is going to be the first black president and she is honoured to be a part of that.”