Ok I found it...it was originally done by Etta james and here are the lyrics of her version (These are just the lyrics):

At last, my love has come along 
My lonely days are over 
And life is like a song
 Oh, yeah, at last
 The skies above are blue
 My heart was wrapped up in clovers
 The night I looked at you
 I found a dream that I could speak to
 A dream that I can call my own 
I found a thrill to rest my cheek to
 A thrill that I have never known 
Oh, yeah when you smile, you smile 
Oh, and then the spell was cast
 And here we are in heaven
 For you are mine 
At last



 
Christina Aguilera also did a re-make of this song...this shows how the song is put together a little better:
(etta james)


At last
My love has come along
My lonely days over
And life is like a song

At last
The skies above are blue
Well my heart was wrapped up in clover
The night I looked at you I found a dream
That I could speak to
A dream that I could call my own
I found a thrill to press my cheek to
A thrill that I have never known well

You smile
You smile
Oh and then the spell was cast
And here we are in heaven



For you are mine at last
I found a dreamthat I could speak to
A dream that icould call my own
I found a thrillto press my cheek to
A thrill that I have never known
Well


You smile
You smile
Oh and then the spell was cast
And here we are in heaven
For you are mine at last
Ooo yea
You are mine
You are mine
At last
At last
At last
At last 
 
 
 
 Hope that helps....Oh a great site with lyrics is metrolyrics.com