Mazzy Star is the late 80's early 90's alternative band from California known for haunting melodies and pierce your heart lyrics.
Overall they haven't achieved world-wide success but darn it, I just love them.
They are most famous for their song Fade Into You (which sounds precisely like the kind of song made for long kisses on cloudy days).
Give her a listen:
I also love 5 String Serenade