Last night, I got served a little bit too much of that poison baby
Last night, I did things I'm not proud of
And I got a little crazy
Last night, I met a guy on the dance floor and I let him call me baby

And I don't even know his last name
My momma would be so ashamed
It started off, hey cutie where you from
And then it turned into oh no, what have I done
And I don't even know his last name

And we left the club right around 3 o'clock in the mornin'
His Pinto, sitting there, in the parking lot, well it should've been a warnin'
And I had no clue what I was gettin' into
So, I'll blame it on the Cuervo

Oh, where did my manners go?

And I don't even know his last name
My momma would be so ashamed
It started off, hey cutie where you from
And then it turned into oh no, what have I done
And I don't even know his last name
[ Lyrics from: http://www.lyricsfreak.com/c/carrie+underwood/last+name_20656266.html ]
Here we go

Today, I woke up, thinkin' 'bout Elvis somewhere in Vegas
I'm not sure how I got here
Or how this ring on my left hand just appeared outta nowhere
I gotta go, I take the chips and the Pinto and hit the road
They say what happens here, stays here, all of this'll disappear

There's just one little problem

I don't even know my last name
My momma would be so ashamed
It started off, hey cutie where you from
And then it turned into oh no, what have I done
And I don't even know my last name

What have I done
What have I done
What have I done

Oh, what have I done
I don't even know my last name

Well it turned into, oh no what have I done
And I don't even know my last name
Yea, Yeah, Yeah

It started off hey cutie where you from
And then it turned into, oh no what have I done
And I don't even know my last name
Oh, yeah