HELP ME, PLEASE! I need help identifying a Spanish song.

I was recently in Spain, and someone showed me a music video.
I loved the song, but I don't remember any lyrics, but I do remember that it was kind of a folk song, all of the music was acoustic guitar.
The video was black and white (sepia toned) and it was shot like an old fashioned film, so it looked kind of choppy.
The song was sung by a woman, and I'm assuming it was the same woman who was in the video.
The woman in the video was sleeping in bed, and she was woken up by a werewolf, who picked her up and took her to a chair.
They hugged each other, and then proceeded on with their night like a normal couple would.
Then the werewolf turned back into a man, and the woman screamed and ran away from him.
Then there was a unicorn, and some kind of small magical creature, and they were dancing with the woman.
Does anyone have any idea what I'm talking about, or do I just sound like a lunatic?

P.S. I was told that the song/video was popular in both Spain and Mexico.

HEEYY!!

the name of the song is: LIMON Y SAL by JULIETA VENEGAS

http://www.youtube.com/watch?v=WQhy3CITqIY

GREAT SONG!!..