The 'So What' hitmaker has joined a campaign to raise money for filmmaker Libby Spears to complete "Playground: The Child Sex Trade in America", reported Daily Express.

The 32-year-old singer is also looking for a distribution deal for the project in a bid to boost awareness and bring an end to sex slavery and human trafficking. Pink, who gave birth to baby daughter Willow last year, was one of the 11 backers who had donated generously. 

Pop star Pink. Pic/Santa Banta