Last Name

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, take the chips,

and the Pinto, and hit the road

They say what happens here, stays here,

All of this will disappear, but there's just one little problem

I don't even know my last name