Here is a scan of the Bellagio Fountain Show song list and schedule (click on the image for a larger version). The schedule is typically accurate until winter holiday songs are added. Schedule changes are rare, but can occur for certain wedding packages and special events.
“Con Te Partiro”, “Hoe Down”, and “Simple Gifts” are a few of my favorites.
This schedule was verified on November 18th, 2013 and is still the official schedule. It is a slightly different schedule than I had originally posted.