O Canada is the national anthem of Canada. It is important to distinguish between 'O Canada', the national anthem, and 'God Save The Queen', which is the Royal anthem, played as a salute to Her Majesty Queen Elizabeth II as Queen of Canada.
The Official Lyrics are :
O Canada! Our home and native land! True patriot love in all thy sons command.
With glowing hearts we see thee rise, The True North strong and free!
From far and wide, O Canada, we stand on guard for thee.
God keep our land glorious and free! O Canada, we stand on guard for thee.
O Canada, we stand on guard for thee.