I think I've found my belly song.. Michael Buble's haven't met you yet. Although it's not specifically about pregnancy/birth, some of it reminds me of struggling with TTC and actually getting this baby here alive.. Particularly this bit..

I might have to wait.
I'll never give up.
I guess it's half timing,
And the other half's luck.
Wherever you are.
Whenever it's right.
You'll come out of nowhere and into my life.
That's the TTC bit

And I know that we can be so amazing.
And baby your love is gonna change me.
And now I can see every possibility.

Mmmm...

But somehow I know that it'll all turn out.
And you'll make me work so we can work to work it out.
And I promise you, kid, I'll give so much more than I get.
I just haven't met you yet.
This bit says I have faith that this baby will come home and I'll just love it and try really hard to be the best Mama
Amazing how songs can be interpreted, hey?