Here are the details...
The singer is female.
The original was someone like Linda Ronstadt, high pitched and sort of in the "Different Drum" voice style.
Some of the lyrics are "you left that day" the last 3 notes played on the piano sample are "on the way" or "along the way".
Humming sample...
http://www.youtube.com/watch?v=Ck1n3TsV4a4
Piano sample...
http://www.youtube.com/watch?v=t2fZmIdTTT8
The last part of the humming sample sounds very familiar but I can't place it yet, thanks - Dan