Hey, on the movie super size me, there is a song that talks about his stomach being full of love or something, yeah who sings that and what's the song called? Yeah thanks a ton guy!

I usually start here to get the soundtrack info: Soundtracks for Super Size Me (2004)

Then I go here to hear snippets of the song: Amazon.com: Super Size Me: Music: Various Artists

I believet the song you are looking for is called "Yummy" by Ohio Express. Here are the lyrics. Hope it helps.

Yummy
Yummy
Yummy
I got love in my tummy
And I feel like a lovin' you;
The Love
You're such a sweet thing
Good enough to eat thing
And that's just a what I'm going to do.
Ooh love
To hold you
Ooh love
To kiss you
Ooh love
I love it so.
Ooh love
You're sweeter
Sweeter than sugar
Ooh love
I won't let you go.
Yummy
Yummy
Yummy
I got love in my tummy
And as silly as it may seem;
The lovin' that you're givin'
Is what keeps livin'
And your love is like peaches and cream.
Kind a like sugar
Kind a like spices
Kind a like
Like what you do.
Kind a sounds funny
But love
Honey
Honey I love you.
Ba da
Ba da da da da.
Ba da da da da
Ba da da da.
Yummy
Yummy
Yummy
I got love in my tummy
That your love can satisfy:
The Love
You're such a sweet thing
Good enough to eat thing
And sweet thing
That ain't no lie.
Ooh love
To hold you
Ooh love
To kiss you
Ooh love
I love it so.
Ooh love
You're sweeter
Sweeter than sugar
Ooh love
I won't let you go.
Ba da
Ba da da da da
Ba da da da