Recently i heard a song 'Lucky' by Jason Mraz and Colbie Cailat. It is a veery good song which sang by good singer. The music is very nice and the lyric is very meaningful. I think this song is very suitable to sing by couple.
I even saw from youtube that 'lucky' was combined with many Disney animation. The video that created was very suitable for the song. You can check it in http://www.youtube.com/watch?v=nR1kx0v53HM.
So don't miss it and enjoy this song.