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Do you know any love song duets in Spanish? :)

There are many.

My favourite is: Te amaré - Miguel Bosé y Laura Paussini

'A Partir De Hoy' (: I love this song. ^-^
http://www.youtube.com/watch?v=b_8ALHEcJ9o

Nada sabe tan dulce como su boca (Ana Belén y Victor Manuel)

Yes, sure a lot of songs, but now I like special one :
Perdoname de Pablo Alboran con Carminho
Let's enjoy it ............ http://www.dailymotion.com/video/xllj5c_pablo-alboran-perdoname-con-carminho_music

Easy to understand, good to practice (present tense context) but a little bit old: Marisela and Marco Antonio Solis "La pareja ideal". I hope you enjoy it: http://www.youtube.com/watch?v=COgvse4y_ag

Here's a small sample of romantic duets. Enjoy them, please
*Puede ser - El canto del Loco & Amaia Montero http://www.youtube.com/watch?v=zczLNq9xEEM
*Si tu no vuelves - Miguel Bosé & Shakira http://www.youtube.com/watch?v=9cgs3hhEiy0
*Colgando en tus Manos-Carlos Baute & Martha Sánchez http://www.youtube.com/watch?v=qExd-3oCTl4
*Te amaré-Miguel Bosé & Laura Pausinni - te amaré http://www.youtube.com/watch?v=yhvy56lZk…
*El regalo más grande-Tiziano Ferro y Amaia Montero http://www.youtube.com/watch?v=OgklVMqaVGA
*Si no te hubiera conocido-Luis fonsi y Christina Aguilera http://www.youtube.com/watch?v=6yijhMlw03Q
*Pingüinos en la cama - Ricardo Arjona & Chenoa http://www.youtube.com/watch?v=8masbRops4I
*Una noche más - The Corrs & Alejandro Sanz http://www.youtube.com/watch?v=nyM7lX8MTL4
*Recuerdame - La quinta estación & Marc Anthony http://es.answers.yahoo.com/question/index?

qid=20091114140641AA8KF07
*Fotografias - Juanes & Nelly Furtado http://www.youtube.com/watch?v=flr8vDQ9Wuc
*Por arriesgarnos-Jenifer lopez$Marc anthony http://www.youtube.com/watch?v=9iv2f2BDShY

I think these are nice:
"Como Lluvia" by Nelly Furtado and Juan Luis Guera:
http://www.youtube.com/watch?v=42RoYaMRcuY&translated=1
Englishman In New York Sting
Hail to the Queen ?
Jerusalem Libera
Blind Breed 77
Novanta Quatro Sportfreunde Stiller
Promiscuous Girl Nelly Furtado
Stop Jane's Addictioni
Ricky Martin Livin Da Vida Loca
Oye Como Va Santana
La Cucaracha Spanish Folk Song