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.
This schedule was verified on March 13, 2014 and is still the official schedule. I will update this post whenever I get a new schedule.
“Con Te Partiro”, “Hoe Down”, and “Simple Gifts” are a few of my favorites.