There are many that I love but this has special meaning to me. It was originally entitled, "You're a Grand Old Rag".
You're a Grand Old Flag
By George M. Cohan
You're a grand old flag,
You're a high flying flag
And forever in peace may you wave.
You're the emblem of
The land I love.
The home of the free and the brave.
Ev'ry heart beats true
'neath the Red, White and Blue,
Where there's never a boast or brag.
Should auld acquaintance be forgot,
Keep your eye on the grand old flag.