Tu guardián - Juanes

It was so sad but I'll always remember it. I was working in the cancer ward as a RN at that time. A little girl, Andiana was her name, maybe 9 was there. Her wish was that she wanted to hear Juanes play. He came and sang the song that was the last she heard. " Duérmete pronto mi amor que la noche ya llego." I remember the smile she had. "Y cierra tus ojos que yo de tus sueños cuidare." I had to go check on another patient, when I came back he was on the last verse, and she on her last breathe. " Duérmete mi amor sueña con mi voz. Duérmete mi amor hasta que salga el sol. Duérmete mi amor sueña con mi voz. Duérmete mi amor que aquí estaré yo."

And translations for my non Spanish speakers! You should listen to this song though it's really good.
http://lyricstranslate.com/en/tu-guardian-your-guardian.html