Mae-Rose Harrison performed at the Queen’s birthday celebrations at Government House in Sydney on Monday.

Guests were also treated to a stunning musical display by the NSW Police Band and NSW Pipes and Drums.

The RSL Youth Choir was the brainchild of OJ Rushton, who at the time was the education and music director for the Kangaroo March Centenary Re-enactment, an Anzac centenary project.

Ms Rushton said the initiative’s 21st Century Leadership Academy and Choir's Ambassador Programme had given young leaders – such as Mae-Rose – high profile opportunities which provided the encouragement to then step up as leaders in their local schools and communities.