Miley Cyrus and Leona Lewis will join music superstars Mariah Carey, Beyoncé, Mary J. Blige, Rihanna, Fergie, Sheryl Crow, Melissa Etheridge, Ashanti, Natasha Bedingfield, Keyshia Cole, Ciara, LeAnn Rimes and Carrie Underwood on the single “Just Stand Up” for the Stand Up To Cancer campaign. The song, to be produced by Kenny “Babyface” Edmonds and Antonio “L.A.” Reid, goes on sale at iTunes September 2.

And don’t forget to tune in for a live performance of “Just Stand Up” during the Stand Up to Cancer Special, airing September 5 on ABC, CBS, NBC; 8 p.m. ET/PT.