British soul singer Joss Stone is writing a campaign song for U.S. presidential hopeful Barack Obama, according to reports.
The star was approached by Obama personally to record a one-off track that will feature as the theme to his election campaign.
A source tells British newspaper The Sun, "Joss is a big supporter of Barack Obama and was very excited to be asked to do this for him.
"He sent a personal message asking her to get on board. He has always admired her music and thinks she is the perfect choice because of her unique appeal to black and white voters.
"She believes he is going to be the first black American president and she is honoured to be a part of that."