The new video, titled "Are Your Words Doing Damage?," shows images of children becoming increasingly affected after facing online abuse -- with Billie's "When the Party's Over" playing in the background. 15-year-old Australian Charlotte McLaverty, who directed the PSA, tells Australian TV show The Project that Billie didn't hesitate when asked to contribute the song. The ad is part of a campaign to raise awareness of a charity called Dolly's Dream, which was set up in memory of a 14-year-old girl who committed suicide after being bullied intensely online and by classmates.