Leona Lewis is teaming up with a host of divas for a star-studded charity single.

Just Stand Up features fifteen singers including Mariah Carey, Beyonce, Mary J Blige, Sheryl Crow and the UK's own Natasha Bedingfield.

The singers will perform the song for a special televised fundraiser in the US on September 5, in aid of the Stand Up to Cancer campaign.

Other A-listers expected to turn out for the show include Reese Witherspoon, Jennifer Aniston, Lance Armstrong, Sally Field, Salma Hayek and Meryl Streep.

Sales from the song will go towards cancer research.

© Independent Television News Limited 2009. All rights reserved.