I have searched the entire internet for this stupid song and i cant find it.

Its from the Once Upon a Time in Mexico Trailer,

and no it isnt on the sound track, and no it isnt a Pistolero remix
(that is what everyone on all the other forums answers)

Its by a husband/wife combo called ParodiFair

unfortunatly i cannot find the full version of the song if one exists.
I'd appreciate anyone who has skills to find it

<a href='http://www.matthewmolloy.com/Onceupon.mp3' target='_blank'>SAMPLE CLIP OF SONG HERE</a>

Couldn't find the song all I could find was people asking for the song.

<a href='http://www.parodifair.com/projects/trailers/' target='_blank'>http://www.parodifair.com/projects/trailers/</a>