This is an absolutely magical song! Juana Molina is a singer/songwriter from Argentina. I first heard her on KCRW (Santa Monica radio station) when I was living in Los Angeles. Her music is totally captivating; it's melodic, ethereal, quirky, whimsical, a little melancholy sometimes, very very sweet. She often uses acoustic instruments (guitar, piano), but what makes her music unique is her use of electronic elements. It often sounds like she is recording in the middle of the rainforest. Tres Cosas, from the album of the same name, is a very up-beat, sparkly little song. Her live performances are archived on the KCRW website: http://www.kcrw.com/ (do a search for Juana Molina in the "Find it!" feature), and you can purchase her music at:
Gourmet Musical http://www.gourmetmusical.com