Rihanna, Ciara, Miley & Others Join Forces To 'Stand Up For Cancer'

The unprecedented gathering features vocals from Mariah Carey, Beyoncé, Mary J. Blige, Rihanna, Fergie, Sheryl Crow, Miley Cyrus, Melissa Etheridge, Ashanti, Natasha Bedingfield, Keyshia Cole, Ciara, Leona Lewis, LeAnn Rimes and Carrie Underwood. The tune is being produced by the powerhouse duo of Kenny "Babyface" Edmonds and Antonio "L.A." Reid, who are working together for the first time in nearly 20 years.

The song will be available for purchase exclusively on iTunes on September 2 and will get its TV premiere on September 5 during the live "Just Stand Up" special, which will air simultaneously and commercial-free on CBS, ABC and NBC. According to a press release announcing the project, the song was conceived by Reid, the chairman of the Island Def Jam Music Group, after a meeting with the women behind the Stand Up to Cancer campaign.