Well I guess I didn't read your initial post thatwell 'cause you already had "We Three Kings" listed.

As a means of redeeming myself, here's a song with one in its title though it also may not fit your stated criteria:

ONE IS THE MAGIC NUMBER
{Jill Scott}

No hay nadie mas que yo,
Uno es el numero magico
En vida y en muerte,
Uno es todo
Comprende
If I multiply 2 times 2 is it really, really 4 me
La [x6]
And if I add 5 to get 9 minus 8 that just leaves me
Me [x8]
So many times I define my pride
Through somebody else's eyes (La da da, la da)
Then I looked inside and found my own stride,
I found the lasting love for me
If I'm searching for my spirituality
Passionately I must begin with me

There's just me...
One is the magic number [x2]

If I add myself unto myself multiplied times
You and yours and you again
There's just me
And if I divide 8 billion, 48 trillion, 98 zillion
There is, there is just me
If I subtract one plus me to the 5th degree,
Use any theorem
There's just me

There's just me...
One is the magic number [x2]

Me, me, me, me...
[Ad lib to end]

http://www.azlyrics.com/lyrics/jillscott/oneisthemagicnumber.html