Spanish song for wedding, first dance?

SO im getting married in about a month. Im starting to make a list of songs for the DJ to play at the reception. But im stuck because i need a good first dance song. My fiance is Mexican so i would like the song to be in spanish. I don't really like the "mariachi" music...but i love spanish guitar and things from Spain. I love the Gipsy Kings and Josh Groban if that helps. I also like reggaeton and artist like Winsin y Yandel and Enrique Iglesias but it needs to be a slow song. THANKS!