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The popstar's first solo release will appear on the soundtrack to the movie Wild Child.
Other acts on the album include Rihanna, Robbie Williams and Nelly Furtado.
A source told The Mirror: "It is a really exciting project for Sarah to be involved with. She was chuffed to be approached and recognised as a singer in her own right.
"It's a pretty cool album with some big names...it promises to be a springboard for other things."
Girls Aloud confirmed during their recent UK tour that they would be recording a follow-up to 2007's Tangled Up album and insisted they weren't splitting up.
