Usually the songs are the ones I play for her.. So we both enjoy many songs. The first one which comes to my mind is a Brazilian song, "Madalena" by Ivan Lins. Then, to play around, I play a childish song from her country, "Dunggeulge dunggeulge" (둥글게 둥글게), and the jingle of the metro of Seoul.
Recently, I enjoy playing for her some jazz songs, especially "Brazilian Love Affair" by George Duke. We surely have a thing with Brazilian music.. Few days ago I played for her "Aquarela do Brasil", "A garota de Ipanema", "Tico Tico no Fuba" and "Agua de beber", and we both enjoyed this.