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AP - What would it sound like if 15 of the hottest female singers joined voices? The answer will be revealed Sept. 2.

That's when "Just Stand Up" hits airwaves and iTunes. The song features 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. All sales of the star-studded single will benefit cancer research.

The charity tune was conceived by Antonio "L.A." Reid, who produced it with longtime creative colleague Kenny "Babyface" Edmonds.

All 15 singers 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.

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.

Stand Up - Various Artists

Beyonce: The heart is stronger than you think
It's like it can go through anything
And even when you think it can't it finds a way to still push on, though

Carrie: Sometimes you want to run away
Ain't got the patience for the pain
And if you don't believe it look into
your heart the beat goes on

Rihanna: I'm tellin' you that
Things get better
Through whatever
If you fall, dust it off, don't let up

Sheryl: Don't you know you can go be your own miracle

Beyonce: You need to know

CHORUS
Sheryl: If the mind keeps thinking you've had enough
But the heart keeps telling you don't give up

Sheryl/Beyonce: Who are we to be
questioning, wondering what is what
Don't give up
THROUGH IT ALL, JUST STAND UP!

Fergie: It's like we all have better days
Problems getting all up in your face

Leona: Just because you go through it

Fergie: Don't mean it got to take control, no

Leona: You ain't gotta find no hiding place

Keyshia: Because the heart can beat the hate

Leona: Don't wanna let your mind keep playin' you

Keyshia: And sayin' you can't go on

Rihanna: I'm tellin' you that

Miley: Things get better
Through whatever

Rihanna: If you fall

Miley: Dust if off, don't let up

LeAnn: Don't you know you

Natasha: Can go

LeAnn: Be your own

Natasha: Miracle

Carrie: You need to know

Ensemble: CHORUS

Mary: You don't gotta be a prisoner in your mind

Ciara: If you fall, dust it off

Mary: You can live your life

Rihanna/Carrie: Yeah

Mary: Let your heart be your guide

Rihanna/Carrie: Yeah yeah yeah

Mariah: And you will know that you're good if you trust in the good

Ashanti: Everything will be alright, yeah
Light up the dark, if you follow your heart

Mary: And it will get better

Mariah: Through whatever

CHORUS

Fergie: You got it in you, find it within
You got in now, find it within now
You got in you, find it within
You got in now, find it within now
You got in you, find it within
Find it within you, find it within
Everyone: THROUGH IT ALL, JUST STAND UP