Well, darn. It's not this one, either.

YOU'RE A GRAND OLD FLAG
George M. Cohan, 1906

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.

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.