The song was "You're My Best Friend". And only a minute or so was played, but at two different times during the half-hour episode. I guess they knew we would all want an encore. It featured Maggie, the baby Simpson, and Moe, the bar tender, who after saving the baby, developed a special bond with the child, that even Maggie could not spend time apart from Moe. I must say that it was a good episode which featured an even better song.