I posted yesterday, but that info was wrong! I wrote to Busch Gardens, and got their answer!! The song is Loving Each Day, written by Greg Alexander, and sung by Ronan Keating.
I've already looked around a little to purchase, and I don't think it will be hard. I don't know exactly where all it might be (on albums, etc.) but I have already found stuff on Ebay! Including that song as a single CD. And as a bonus, here are the lyrics I found: So there you go! And thanks to Busch Gardens office staff!

Ronan Keating
Lovin' Each Day
Yeah-Uh
We're loving each day as if it's the last
Dancing all night and havin' a blast
Oh baby I need you here
Girl I'm on a mission
To cure my condition
Cos' without your kissin'
My heart's just a prison
I'm hoping and wishin'
That girl I'm forgiven
Say yeah
Cos every time you leave me I'm sad
The moment you're returning I'm glad
So lets not go forgetting what we had
Cause it's bad
So damn bad, yeah
[Chorus]
We're loving each day as if it's the last
Dancing all night and havin' a blast
Oh baby I want you right here next to me
We're loving each day as if it's our last
Dancing all night and havin' a laugh
Please baby I need you here
If I hurt your feelings
Then baby we're even
Cos I've been bereavin'
Since you said you're leaving
But now you're by my side
Lets not fight
Cos you're right
That every time I lose you
I'm lost
No more you versus me girl
There's just us
Cos anything without you's
Just a bust
Baby trust
You're a must, yeah
[Repeat chorus]
So don't go throwing our love away
It's here to stay
I'm telling you
There is nothing that can stop us anyway
Our love is an ocean
Let's get it in motion
[Repeat chorus]
I need you here
I need you here
I need you here
Cos we're loving, and we're dreaming, and we're hoping, and we're dreaming
Cos we're loving, and we're giving, and we're hoping, and we're dreaming