Solved: Spanish song: can anyone identify it, pls?

Hi everybody,

Help me please identify the song I could hear on many occasions but have never been lucky enough to get the idea about its title. For sure it's Spanish (or at least I have always heard versions in this language), sung by a woman with a delicate, clear voice. I know that it's not new, well more than 15-20 years old if not more. I hard it for the first time in the early nineties. But it has to be quite popular since I can hear it at times, last time, this year on the radio in Spain. Unfortunately I can't quote any lyrics but I can say that it's a Waltz. I could see professional dancers using this song as a "background" for their dancing.

I hope that this info. will be sufficient.
I'll be grateful for any help.

Hey...

Ok. So lets try...

1. http://www.youtube.com/watch?v=pGMVHw2X0FM

2. http://www.youtube.com/watch?v=7IguUFc7af4

Or maybe another thing that u remember, maybe a word.. or any part of the lyrics.. ?? xS

3. http://www.youtube.com/watch?v=G4HO6AQMQAk

4. http://www.youtube.com/watch?v=GZcZwUBU1ek

Fiona, you're great, that's your first suggestion, I'm really grateful.

May your dreams come true in 2009, you've just fulfilled one of mine.

All the best