Miley Cyrus and Rihanna in Just Stand Up

Mariah Carey, Beyonce, Mary J. Blige, Rihanna, Fergie, Sheryl Crow, Miley Cyrus, Melissa Etheridge, Ashanti, Natasha Bedingfield, Keyshia Cole, Ciara, Leona Lewis, LeAnn Rimes and Carrie Underwood, 15 of the hottest female singers in the world join voices for Just Stand Up, a single that will benefit cancer research.




"Just Stand Up" hits airwaves and iTunes on Sept. 2. All sales of the star-studded single will benefit cancer research.

All 15 stars will share the stage to perform the song live on Sept. 5 during the "Stand Up to Cancer" television special, set to air simultaneously on ABC, NBC and CBS. Other stars expected to turn out for the hourlong fund- and awareness-raising program include Jennifer Aniston, Lance Armstrong, Katie Couric, Sally Field, Salma Hayek, Meryl Streep, Forest Whitaker and Reese Witherspoon.

Just Stand Up was conceived by Antonio "L.A." Reid and Kenny "Babyface" Edmonds.

Founded in 2007, Stand Up to Cancer is a program of the Entertainment Industry Foundation that calls on entertainment-industry people and platforms to help fight cancer.