Pixie Lott has donated her song Get Weak to a bullying charity to raise awareness about the issue.
The song will become the anthem for Beatbullying's Big March, a global online protest campaign.
The Big March is calling for a bullying review to work with victims, schools and the Government to tackle the issues of bullying, harassment and violence against children.
It is also asking the Government to create two new Bills - a School Safety Bill to make it against the law to hurt, harass or bully children in school, and a Cyber Bullying Bill to protect youngsters online.
Pixie said: "As an ambassador of Beatbullying I know that anyone can be a victim of bullying - it's not embarrassing!
"Tall or short, skinny or big, they always find something to pick at. Don't let them win. If you're determined to make it, you can and you will."
The song is available for free download for a limited period from the Beatbullying website.